QUESTIONS ) Of the following the graph which represents the variation of Energy (E) of the photon with the wavelength (λ) is E E 1) 2) 3) 4)
|
|
- Arlene Gregory
- 5 years ago
- Views:
Transcription
1 CET II PUC: PHYSICS: ATOMIC PHYSICS INTRODUCTION TO ATOMIC PHYSICS, PHOTOELECTRIC EFFECT DUAL NATURE OF MATTER, BOHR S ATOM MODEL SCATTERING OF LIGHT and LASERS QUESTIONS ) Wic of te following statements are correct? a) Electromagnetic waves can ave wavelengts of several kilometres. b) Hig energy gamma rays travel at a iger speed tan lower energy ones in free space. c) X-rays are transverse waves. d) An electromagnetic wave can penetrate matter. ) (a), (b) and (c) 2)(b), (c) and (d) 3) (a), (c) and (d) 4)(a), (b) and (d) 2) Given tat te mass of neutron or proton is approximately 840 times te mass of electron, ten te ratio of specific carge of electron to tat of α-particle is ) 840 2)3680 3) 4) ) Of te following te grap wic represents te variation of Energy (E) of te poton wit te wavelengt (λ) is E E E E λ λ λ λ ) 2) 3) 4) 4) Matc te following: List List 2 a) Burning candle i) Line absorption spectrum b) Sodium vapour lamp ii) Continuous emission spectrum c) Sun iii) Band emission spectrum d) Bunsen flame iv) Line emission spectrum ) a iii, b i, c iv, d ii 2) a iv, b ii, c i, d iii 3) a ii, b iii, c i, d iv 4) a ii, b iv, c i, d iii 5) Te kinetic energy of te potoelectron increases by 0.5 ev wen te wavelengt of incident ligt is canged from 500nm to anoter wavelengt wic is nearly ) 400 nm 2) 700 nm 3)000 nm 4) 250 nm
2 6) Ligt potons of energies ev and 2.5 ev are successively incident on a metal surface of work function 0.5 ev, ten te ratio maximum velocities of te emitted electrons will be ) : 5 2) : 4 3) : 3 4) : 2 7) Wen UV ligt of wavelengt 00 nm is incident on silver surface of work function 4.7eV, a negative potential of 7.7V is required to stop te potoelectrons from reacing te collector plate. Te potential wic is required to stop te potoelectrons wen ligt of wavelengt 200nm is incident on it will be ).5V 2) 3V 3)4.5V 4) 6V 8) Wen a monocromatic point source of ligt is at a distance of.50 m from a potoelectric cell, te cut-off voltage and te saturation current are respectively 2V and 20 µa. If te same source is placed 75cm away from te potoelectric cell, ten ) Te stopping potential will be 2V and saturation current will be 80 µa 2) Te stopping potential will be 4V andsaturation current will be 80 µa 3) Te stopping potential will be 2V and saturation current will be 40 µa 4) Te stopping potential will be 4V andsaturation current will be 40 µa 9) If E is te energy, de-broglie wavelengt is proportional to ) E for bot potons and particles 2) E for potons and E /2 particles 3) E /2 for bot potons and particles 4) E /2 for potons and E for particles 0) Te resolving power of an electron microscope at 0 kv is R. Te potential increased to 90 kv. Te new resolving power will be ) R 2) 3R 3) R/3 4) 9R ) For given kinetic energy wic of te following as te smallest de-broglie wavelengt? ) Electron 2)Proton 3)Neutron 4) alpa particle 2) Te ionization energy of electron in te ydrogen in its ground state is 3.6 ev. Te atoms are excited to iger energy levels to emit radiations of 6 wavelengts. Maximum wavelengt of emitted radiation corresponds to te transition between ) n = 2 to n = 2)n = 3 to n = 3)n = 3 to n = 2 4) n = 4 to n =3 3) Hydrogen atom emits blue ligt wen an electron jumps from n = 4 to n = 2 energy level. Te colour of ligt emitted by te atom wen te electron jumps from n = 5 to n = 2 energy level is ) red 2) yellow 3) green 4) violet 4) Force acting on an electron in a Bor orbit wit principal quantum number n is proportional to ) n 2)n 2 3) n 4 4) /n 4 5) Te kinetic energy of te orbiting electron in te ydrogen atom is E, ten te potential energy and te total energy wit proper sign are respectively ) E, 2E 2) 2E, E 3) E, 2E 4) 2E, E 6) Te orbital radius of te electron in te ydrogen atom canges from r to 4r, ten te energy of te orbital electron cange from E to ) E/4 2) E/2 3) 2E 4) 4E 7) Wen ydrogen atom is excited state, emits a poton of energy 2. ev wen it makes a transition to a ground state, its orbital angular momentum canges by ) Js 2) Js 3) Js 4) Js
3 8) How many times does te electron go around te first Bor orbit in one second? π mr ) 2) 3) 4) 2 π mr π mr 2 π mr 9) Angular momentum of an electron in an orbit of H atom is proportional to ) r 2) 3) r 4) r r 20) Energy levels A, B, C of a certain atom correspond to increasing values of energy i.e.,e A < E B < E C. If λ, λ 2, λ 3 are te wavelengts of radiations corresponding to te transitions C to B, B to A and C to A respectively, wic of te following statements is correct? λ λ2 )λ 3 = λ + λ 2 2) λ = 3)λ + λ 2 + λ 3 = 0 4) λ = λ + λ2 λ + λ 3 2 2) If λ, λ and λ 2 are te wavelengts of stokes lines, incident ligt and anti-stokes lines respectively ten ) λ = λ = λ 2 2)λ <λ<λ 2 3)λ >λ>λ 2 4) λ <λ 2 <λ 22) Ceck te incorrect statements on scattering of ligt. ) Blue colour of sky is due to Rayleig scattering 2) In Rayleig scattering intensity of scattered ligt is proportional to /λ 4 3) Clouds aving droplets of water, wic scatter all te wavelengts almost equal, so tey are generally wite. 4) Te sun looks reddis at sunset and sunrise due to Tyndall scattering. 23) A composite beam of ligt containing wavelengts 440nm and 550nm is passed troug a gas, in a given direction, te ratio of te intensity of scattered ligt of tose wavelengts will be ) 6 : 25 2) 25 : 6 3)256 : 625 4) 625 : ) Consider te statements. A laser beam (a) is igly monocromatic (b) as angular divergence (c) is an electromagnetic wave (d) cannot be used in optical communication. ) (a) (b) and (c) are correct 2) (a) (c) and (d) are correct 3) (a) and (c) are incorrect 4) (b) and (d) are incorrect 25) Wic of te following statement is WRONG wit respect to Ruby laser? )It is developed by T. Maiman. 2)Te wavelengt of ligt emitted by it is 694.3nm. 3) It is a continuous laser. 4) It is a tree level laser. 26) Te tecnique to measure large distances using lasers is known as ) LIDAR 2) RADAR 3) SONAR 4) bot (2) and (3) 27) Ligt of wavelengt 300nm is incident on a surface of area 4 cm 2. If te intensity of ligt is 50mW/m 2, ten rate at wic potons strike te target (per second) is ) ) ) ) ) An X ray poton as a wavelengt of 0.02 Å. Its momentum is ) kg m/s 2) kg m/s 3) kg m/s 4) kg m/s 29) Wic one is te correct about te electromagnetic waves in free space? ) Electric and magnetic fields ave a pase difference of π/2. 2) Te speed of te wave is c = B/E.
4 3) Energy distribution of electric and magnetic fields are unequal. 4) Electromagnetic waves transport bot energy and momentum. 30) Te maximum velocity of potoelectrons emitted by a poto emitter is m/s. If te specific carge of an electron is.75 0 C/kg, stopping potential of te emitter is ) 0.7 V 2).4 V 3)2.8 V 4) 3.5 V 3) If te velocity of a particle is reduced to one-tird ten te percentage increase in its de-broglie wavelengt is ) 50% 2) 00% 3) 200% 4) 300% 32) A proton and an α-particle are accelerated troug te same p.d.. Te ratio of teir de-broglie wavelengts is ) 2) 2 3) 8 4)/ 8 33) Energy required for te electron excitation in Li ++ from first orbit to tird orbit is ) 2. ev 2)36.3 ev 3)08.8 ev 4) 22.4 ev 34) Pick out te wrong statement from te following: ) As observed in spectrograps of ig resolving power te H α, H β and H γ lines are not single lines 2) According to Sommerfeld, te pat of an electron around te nucleus is an ellipse 3) Te speed of te electron moving in an elliptical orbit is a constant 4) Te principal quantum number n takes integral values from to 35) Rayleig scattering law is not applicable to ) Water molecules 2)Gas molecules 3) Particles very small compared to wavelengt of ligt 4) large dust particles 36) Te material used in Ruby lasers is ) Naturally occurring Ruby 2) Amorpous Al 2 O 3 3) Crystalline Al 2 O 3 doped wit cromium 4) Cromium crystal doped witaluminium 37) Coose te WRONG statement out of te following. ) X rays are used in of study of crystal structure. 2) Like visible ligt, X rays are diffracted at anobstacle. 3) X rays can cause ionization of te atoms of a gases. 4) X rays are deflected by electric and magnetic fields. 38) Wic of te following is not correct regarding te poton? )ν = E/ 2) Momentum of poton = /λ 3) Mass of poton = /cλ 4) λ = ν/c 39) If potons of wavelengt 60nm are incident on ydrogen, ten te maximum kinetic energy of emitted electrons will be ) 3 ev 2) 5 ev 3)7eV 4) 9 ev 40) Te work function of a surface of a potosensitive material is 6.2eV. Te wavelengt of te incident radiation for wic te stopping potential is 5V lies in te ) Infra-red 2) Visible ligt 3)Ultraviolet ligt 4) X-ray 4) Te kinetic energies of potoelectrons emitted from a metal are K and K 2 wen it is irradiated wit ligts of wavelengt λ and λ 2 respectively. Te work function of te metal is Kλ K 2λ2 Kλ+ K2λ2 Kλ2 K2λ Kλ2 + K2λ ) 2) 3) 4) λ λ λ + λ λ λ λ + λ
5 42) In Sommerfeld s atomic model corresponding to principal quantum number n = 3, tere will be ) 3 circular orbits 2) 3 elliptical orbits 3) circular and 2 elliptical orbits 4) 2 circular and elliptical orbits 43) Consider te spectral line resulting in te transition from n = 2 to n =, in atoms / ions given below. Te igest frequency radiation is emitted by ) Hydrogen atom 2)Deuterium atom 3)Singly ionized elium 4) Doubly ionized litium 44) In wic of te following systems will te radius of te first orbit (n = ) be minimum? ) Hydrogen atom 2)Deuterium atom 3)Singly ionized elium 4) Doubly ionized litium 45) Te wavelengt of te matter waves is independent of ) mass 2)velocity 3)momentum 4) carge 46) A poton of energy 9 ev is incident on a surface wose tresold frequency is Hz. Te kinetic energy of te emitted electrons is ) 2.37 ev 2)7.4 ev 3)9 ev 4) 0.6 ev 47) Te momentum of a neutron of de-broglie wavelengt 0. nm is ) kg ms - 2) kg ms - 3) kg ms - 4) kg ms - Additional Questions: INTRODUCTION TO ATOMIC PHYSICS ) Infrared rays are used in long distance potograpy because ) Tey travel wit te velocity of ligt in vacuum. 2) Tey can be easily produced. 3) Due to teir long wavelengt, scattering is low. 4) Due to teir small wavelengt, scattering is ig. 2) An electromagnetic radiation as energy of 3.2keV. Ten te radiation belongs to te region of ) Infra-red 2) Visible ligt 3)Ultraviolet ligt 4) X-ray 3) Flas spectrum tat occurs at a total solar eclipse is ) Line absorption spectrum 2)Line emission spectrum 3)Band emission spectrum 4)Band absorption spectrum 4) Band spectrum is obtained wenever te incandescent vapour of te excited substance is in ) Atomic state 2)Molecular state 3)Ionised state 4)Atomicor Molecular state 5) A radio transmitter radiates 0.kW power at a wavelengt 98.6 nm. Te number of potons emitted per second by it is ) 0 0 2)0 20 3)0 30 4)0 40 6) Consider te following statements about electromagnetic waves and coose te correct ones. A) EM waves aving wavelengt 000 times smaller tan visible ligt waves are called X-rays. B) Ultraviolet waves are used sterilization of water and surgical equipment s.
6 C) de-broglie waves are electromagnetic in nature. D) Electromagnetic wavesexibit polarization wile sound waves do not. ) (A), (B) and (C) 2)(A), (B) and (D)3) (B), (C) and (D) 4)(A), (C) and (D) 7) Te ratio of specific carge of te electron and nucleus of ydrogen atom is nearly ) 2) 2 3) 4 4) 836 8) Identify te correct arrangement of electromagnetic radiations in ascending order of frequency. )γ- rays, X- rays, Visible ligt, radio waves. 2) Ultraviolet rays, visible ligt, X-rays, Infra-red rays. 3) Radio waves, micro waves, visible ligt, UV rays. 4) Infra-red rays, UV rays, γ- rays, X- rays. 9) In determining specific carge of electrons by Dunnington, electrons are made to negotiate a circular pat by ) Electric field only 3) Bot electric and magnetic fields in te same directions 2) Magnetic field only 4) Mutually perpendicular electric and magnetic fields PHOTOELECTRIC EFFECT ) Potons wit energies twice and ten times te work function of a metal are incident successively on a metal. Te ratio of te maximum energies of te potoelectrons emitted in te two cases is respectively ) : 5 2)5 : 3) : 3 4) : 9 2) Work function for copper is 4.4 ev. Te potential difference tat must be applied to stop te fastest electrons released wen ligt of wavelengt 00 nm is incident is ) 4 V 2)8 V 3)6 V 4)20 V 3) On plotting frequency of incident radiation along X axis and stopping potential along Y axis, a straigt line is obtained. Its slope is ) /e 2)e/ 3) 4)/ 4) For a potoelectric cell, te grap in Fig. sowing te variation of te cut-off voltage V 0 wit frequency (v) of incident ligt is V 0 V 0 V 0 V ν ν 0 ν 0 ν ) 2) 3) 4) 5) A potosensitive metal is incident wit radiations of wavelengt 400 nm and ten wit radiations of wavelengt 800 nm. Wat will be te difference in te maximum energy of te potoelectrons ) 0.5 ev 2) ev 3).5 ev 4) 2 ev
7 6) Monocromatic ligt of frequency ν irradiates a potocell and te stopping potential is found to be V. Wat is te new stopping potential of te cell if it is irradiated by monocromatic ligt of frequency ν 2? ) V + ( ν2 ν) 2) V ( ν2 ν) 3) V + ( ν+ ν2) 4) V ( ν+ ν2) e e e e 7) Wen radiation of wavelengtλ is incident on a metallic surface, te stopping potential is 4.8V. If te same surface is illuminated wit radiation of double te wavelengt, ten te stopping potential becomes.6 V. Ten te tresold wavelengt for te surface is ) 2λ 2) 4λ 3)6λ 4) 8λ DUAL NATURE OF MATTER ) If te kinetic energy of a particle is reduced to one-fourt ten te percentage increase in te de-broglie wavelengt is ) 4% 2)00% 3)44% 4) 200% 2) If E, E 2 and E 3 are te respective kinetic energies of an electron, an alpa particle and a proton eac aving te same de-broglie wavelengt ten ) E > E 3 > E 2 2)E 2 > E 3 > E 3)E > E 2 > E 3 4)E = E 2 = E 3 3) Wavelengt of a γ- ray poton wose energy is alf te rest mass energy of an electron is ) m 2)5 0 8 m 3)7 0 2 m 4)7 0 2 m 4) A marble of mass 30g is moving wit a speed of 80 kmp. Te de-broglie wavelengt associated wit is nearly ) 0 m 2)0 0 m 3) Å 4) Å 5) Coose te only correct statement out of te following. ) only a carged particle in motion is accompanied by matter waves 2) only subatomic particles in motion are accompanied by matter waves 3) any particle in motion, weter carged or uncarged, is accompanied by matter waves 4) no particle, weter at rest or in motion, is ever accompanied by matter waves 6) Te de-broglie wavelengt associated wit an electron wen it is accelerated troug a p.d. of 40 kv is ) 0.64 pm 2)6.4 pm 3)6.4 Å 4) pm 7) Te de-broglie wavelengt of a particle moving wit velocity 0 8 m/s is equal to te wavelengt of a poton. Te ratio of kinetic energy of te particle to te energy of te poton is ) /8 2) /6 3)¼ 4) ½ 8) Electrons used in an electron microscope are accelerated by a voltage of 25kV. If te voltage is increased to 00kV ten te de-broglie wavelengt associated wit te electrons would ) increases to 2 times 2) increases to 4 times3)decreases by 2 times4)decreases by 4 times
8 9) Electrons beave like waves in G.P. Tomson experiment because tey ) Ionize te gas 2) Are affected by electric field 3) Are deflected by magnetic field 4) Diffracted by a crystal 0) Wave nature of matter is revealed by ) Potoelectric effect 2) Raman effect 3) Electron diffraction 4) Compton effect ) Te de-broglie wavelengt of electron is 0.5nm, te retarding potential to stop it is ) 2V 2) 3V 3)4V 4) 6V 2) Te momentum of electron aving de-broglie wavelengt00å is ) g cm/s 2) g cm/s 3) g cm/s 4) g cm/s 3) Electron microscope works on te principle of ) Particle nature of electron 2) Wave nature of electron 3) Wave nature of ligt 4) Quantum nature of ligt BOHR S ATOM MODEL ) Te ratio of kinetic energy of te n = 2 state electron for te ydrogen atom to tat of He + ion is ) 2) 2 3)½ 4) ¼ 2) An electron in a ydrogen atom as moved from n = to n = 5 orbit, ten ) Bot potential energy and kinetic energyof te system increases. 2)Bot potential energy and kinetic energy of te system decreases. 3)Potential energy of te system decreases and kinetic energy of te system increases. 4) Potential energy of te system increases and kinetic energy of te system decreases. 3) In case of ydrogen atom te ratio of energy difference between second orbit and tird orbit to te energy difference between te first orbit and te second orbit is ) 9/4 2)4/9 3)5/27 4) 27/5 4) Te minimum required to strip off energy of 0 times ionized sodium atom (Z = ) of its last electron is ) 3.6eV 2)3.6 ev 3) ev 4)(3.6/) ev 5) Te de-broglie wavelengt of te electron in te first excited state of te ydrogen atom is nearly ) 0.53Å 2).67 Å 3)3.33 Å 4) 6.66 Å 6) Te transition of te electron from n = 4 to n =3 in a ydrogen like atom results in UV radiation. Infra-red radiation will be obtained in te transition ) n = 2 to n = 2)n = 3 to n =2 3)n = 4 to n =2 4) n = 5 to n =4
9 7) Te ionization potential of ydrogen atom is 3.6 V. Hydrogen atoms in te ground state are excited by electromagnetic radiation of energy 2.75eV. How many spectral lines will be emitted by te ydrogen atom? ) 2) 2 3)3 4) 6 8) Fine structure of spectral lines is accounted in Sommerfield atom model by considering ) Elliptical orbits around te nucleus 2) Spin of electron 3)Relativistic cange in mass of electron in elliptical orbits 4) Space quantisation of orbits 9) Te area of te electron orbit for te ground state of H-atom is A. Te area wen it is in te first excited state is ) 2A 2)4A 3)8A 4) 6A 0) Te ionization potential of ydrogen atom is 3.6V. Te energy needed to be supplied to ionize ydrogen atom in te first excited state. ) 3.6 ev 2)3.4 ev 3)6.8 ev 4) 27.2 ev ) An electron jumps from first excited state to ground state of ydrogen atom, ten te percentage cange in speed of electron ) 25% 2) 50% 3) 00% 4) 200% 2) An electron jumps from te 4 t orbit to 2 nd orbit of ydrogen atom.givente Rydberg s constant R = 0 5 cm -, te frequency (in Hz) of emitted radiation will be ) ) ) ) SCATTERING OF LIGHT ) Raman effect is explained on te basis of ) Corpuscular teory of ligt 2) Waveteory of ligt 3) Electromagnetic teory of ligt 4) Quantum teory of ligt. 2) Pick out te incorrect statement from te following ) Stokes lines ave wavelengts greater tan tat of te incident ligt 2) Stokes lines are more intense tan te anti-stokes lines 3) Te intensity of stokes lines is found to depend on temperature 4) Stokes and anti-stokes lines are polarized. 3) Te blue colour of te sky is due to te fact tat ) Red ligt is absorbed 2) Blue ligt is preferentially absorbed 3) Blue ligt is preferentially scattered 4) Blue is te natural colour of te sky 4) In a given direction, te intensities of scattered ligt substance for two beams of ligt are in te ratio 8: 6. Te ratio of frequency of te first beam to te frequency of te second beam is ) 3:2 2) 2:3 3) 9:4 4)4:9
10 LASERS ) Average life time of metastable state is ) 0 3 s 2)0 8 s 3)0 4 s 4) 0 20 s 2) Te output of Ruby Laser is pulsed because )Ruby rod gets eated. 2) Stimulated emission is delayed. 3) Optical pumping cannot be continuous. 4) Stimulated emission occurs faster tan population inversion. 3) Te red colour of Ruby laser ligt is due to electron transition between energy levels of ) Aluminium 2)Oxygen 3) Cromium 4) All of tese 4) Te most relevant property involved in te cutting of metals by a laser beam is ) Monocromaticity 2) Coerence 3)Directionality 4) Sarp focus 5) Ifr a = rate of absorption, r b = rate of spontaneous emission and r c = rate of stimulated emission, ten for Laser action te condition to be satisfied is ) r b >r a 2)r c >r a 3)r c >r b 4) bot (2) and (3) 6) Potonics is concerned wit ) Lasers 2) Fibre optics 3) Optical computing 4) All tese 7) In Ruby laser stimulated emission is due to transition from ) One excited state to lower excited state 2) metastable state to a certain lower state 3) metastable to an excited state 4) metastable state to ground state only 8) Ruby laser belongs to te class of ) Solid state lasers 2) Gas lasers 3) Liquid lasers 4) Semiconductor diode laser
DUAL NATURE OF RADIATION AND MATTER
DUAL NATURE OF RADIATION AND MATTER Important Points: 1. J.J. Tomson and Sir William Crookes studied te discarge of electricity troug gases. At about.1 mm of Hg and at ig voltage invisible streams called
More informationPreview from Notesale.co.uk Page 2 of 42
1 PHYSICAL CHEMISTRY Dalton (1805) Tomson (1896) - Positive and negative carges Ruterford (1909) - Te Nucleus Bor (1913) - Energy levels Atomic Model : Timeline CATHODE RAYS THE DISCOVERY OF ELECTRON Scrödinger
More informationAssignment Solutions- Dual Nature. September 19
Assignment Solutions- Dual Nature September 9 03 CH 4 DUAL NATURE OF RADIATION & MATTER SOLUTIONS No. Constants used:, = 6.65 x 0-34 Js, e =.6 x 0-9 C, c = 3 x 0 8 m/s Answers Two metals A, B ave work
More information1) Introduction 2) Photo electric effect 3) Dual nature of matter 4) Bohr s atom model 5) LASERS
1) Introduction 2) Photo electric effect 3) Dual nature of matter 4) Bohr s atom model 5) LASERS 1. Introduction Types of electron emission, Dunnington s method, different types of spectra, Fraunhoffer
More informationATOMIC PHYSICS PREVIOUS EAMCET QUESTIONS ENGINEERING
ATOMIC PHYSICS PREVIOUS EAMCET QUESTIONS ENGINEERING 9. Te work function of a certain metal is. J. Ten te maximum kinetic energy of potoelectrons emitted by incident radiation of wavelengt 5 A is: (9 E)
More informationUNIT-1 MODERN PHYSICS
UNIT- MODERN PHYSICS Introduction to blackbody radiation spectrum: A body wic absorbs all radiation tat is incident on it is called a perfect blackbody. Wen radiation allowed to fall on suc a body, it
More informationWAVES AND PARTICLES. (c)
WAVES AND PARTICLES 1. An electron and a proton are accelerated through the same potential difference. The ration of their De Broglie wave length will be -- (a) (b) (c) (d) 1 2. What potential must be
More informationDual Nature of matter and radiation: m v 1 c
Dual Nature of matter and radiation: Potons: Electromagnetic radiation travels in space in te form discrete packets of energy called potons. Tese potons travel in straigt line wit te speed of ligt. Important
More informationM12/4/PHYSI/HPM/ENG/TZ1/XX. Physics Higher level Paper 1. Thursday 10 May 2012 (afternoon) 1 hour INSTRUCTIONS TO CANDIDATES
M12/4/PHYSI/HPM/ENG/TZ1/XX 22126507 Pysics Higer level Paper 1 Tursday 10 May 2012 (afternoon) 1 our INSTRUCTIONS TO CANDIDATES Do not open tis examination paper until instructed to do so. Answer all te
More informationTest on Nuclear Physics
Test on Nuclear Pysics Examination Time - 40 minutes Answer all questions in te spaces provided Tis wole test involves an imaginary element called Bedlum wic as te isotope notation sown below: 47 11 Bd
More informationThe structure of the atoms
Te structure of te atoms Atomos = indivisible University of Pécs, Medical Scool, Dept. Biopysics All tat exists are atoms and empty space; everyting else is merely tougt to exist. Democritus, 415 B.C.
More information7. QUANTUM THEORY OF THE ATOM
7. QUANTUM TEORY OF TE ATOM Solutions to Practice Problems Note on significant figures: If te final answer to a solution needs to be rounded off, it is given first wit one nonsignificant figure, and te
More informationChapter-11 DUAL NATURE OF MATTER AND RADIATION
Chapter-11 DUAL NATURE OF MATTER AND RADIATION Work function (j o ): The minimum energy required for an electron to escape from the surface of a metal i.e. The energy required for free electrons to escape
More informationProblem Set 4 Solutions
University of Alabama Department of Pysics and Astronomy PH 253 / LeClair Spring 2010 Problem Set 4 Solutions 1. Group velocity of a wave. For a free relativistic quantum particle moving wit speed v, te
More informationnucleus orbital electron wave 2/27/2008 Quantum ( F.Robilliard) 1
r nucleus orbital electron wave λ /7/008 Quantum ( F.Robilliard) 1 Wat is a Quantum? A quantum is a discrete amount of some quantity. For example, an atom is a mass quantum of a cemical element te mass
More information38. Photons and Matter Waves
38. Potons and Matter Waves Termal Radiation and Black-Body Radiation Color of a Tungsten filament as temperature increases Black Red Yellow Wite T Termal radiation : Te radiation depends on te temperature
More informationPhysics Teach Yourself Series Topic 15: Wavelike nature of matter (Unit 4)
Pysics Teac Yourself Series Topic 15: Wavelie nature of atter (Unit 4) A: Level 14, 474 Flinders Street Melbourne VIC 3000 T: 1300 134 518 W: tss.co.au E: info@tss.co.au TSSM 2017 Page 1 of 8 Contents
More information1. ATOMIC STRUCTURE. Specific Charge (e/m) c/g
1. ATOMIC STRUCTURE Synopsis : Fundamental particles: According to Dalton atom is te smallest indivisible particle. But discarge tube experiments ave proved tat atom consists of some more smaller particles.
More informationChemistry (
Question 2.1: (i) Calculate the number of electrons which will together weigh one gram. (ii) Calculate the mass and charge of one mole of electrons. Answer 2.1: (i) Mass of one electron = 9.10939 10 31
More informationIntroduction. Learning Objectives. On completion of this chapter you will be able to:
Introduction Learning Objectives On completion of tis capter you will be able to: 1. Define Compton Effect. 2. Derive te sift in incident ligt wavelengt and Compton wavelengt. 3. Explain ow te Compton
More informationContents. Theory Exercise Exercise Exercise Exercise Answer Key 28-29
ATOMIC STRUCTURE Topic Contents Page No. Teory 0-04 Exercise - 05-4 Exercise - 5-9 Exercise - 3 0-3 Exercise - 4 4-7 Answer Key 8-9 Syllabus Bor model, spectrum of ydrogen atom, quantum numbers; Wave-particle
More informationStellar Astrophysics: The Interaction of Light and Matter
Stellar Astrophysics: The Interaction of Light and Matter The Photoelectric Effect Methods of electron emission Thermionic emission: Application of heat allows electrons to gain enough energy to escape
More information1 The Cathode Rays experiment is associated. with: Millikan A B. Thomson. Townsend. Plank Compton
1 The Cathode Rays experiment is associated with: A B C D E Millikan Thomson Townsend Plank Compton 1 2 The electron charge was measured the first time in: A B C D E Cathode ray experiment Photoelectric
More informationis the minimum stopping potential for which the current between the plates reduces to zero.
Module 1 :Quantum Mechanics Chapter 2 : Introduction to Quantum ideas Introduction to Quantum ideas We will now consider some experiments and their implications, which introduce us to quantum ideas. The
More informationQuantum and Atomic Physics - Multiple Choice
PSI AP Physics 2 Name 1. The Cathode Ray Tube experiment is associated with: (A) J. J. Thomson (B) J. S. Townsend (C) M. Plank (D) A. H. Compton 2. The electron charge was measured the first time in: (A)
More informationPart C : Quantum Physics
Part C : Quantum Pysics 1 Particle-wave duality 1.1 Te Bor model for te atom We begin our discussion of quantum pysics by discussing an early idea for atomic structure, te Bor model. Wile tis relies on
More informationFinal exam: Tuesday, May 11, 7:30-9:30am, Coates 143
Final exam: Tuesday, May 11, 7:30-9:30am, Coates 143 Approximately 7 questions/6 problems Approximately 50% material since last test, 50% everyting covered on Exams I-III About 50% of everyting closely
More information28 64 Ni is - g/mole Se (D)
EXERCISE-0 CHECK YOUR GRASP SELECT THE CORRECT ALTERNATIVE (ONLY ONE CORRECT ANSWER). Te element aving no neutron in te nucleus of its atom is - (A) ydrogen (B) nitrogen (C) elium (D) boron. Te particles
More informationProblem Set 4: Whither, thou turbid wave SOLUTIONS
PH 253 / LeClair Spring 2013 Problem Set 4: Witer, tou turbid wave SOLUTIONS Question zero is probably were te name of te problem set came from: Witer, tou turbid wave? It is from a Longfellow poem, Te
More informationQuestion 11.1: Find the
Question 11.1: Find the (a) maximum frequency, and (b) minimum wavelength of X-rays produced by 30 kv electrons. Potential of the electrons, V = 30 kv = 3 10 4 V Hence, energy of the electrons, E = 3 10
More informationCHAPTER 7 QUANTUM THEORY AND ATOMIC STRUCTURE
CHAPTER 7 QUANTUM THEORY AND ATOMIC STRUCTURE Te value for te speed of ligt will be 3.00x0 8 m/s except wen more significant figures are necessary, in wic cases,.9979x0 8 m/s will be used. TOOLS OF THE
More informationTHE NATURE OF THE ATOM. alpha particle source
chapter THE NATURE OF THE ATOM www.tutor-homework.com (for tutoring, homework help, or help with online classes) Section 30.1 Rutherford Scattering and the Nuclear Atom 1. Which model of atomic structure
More informationminimum wavelength of X-rays produced by 30 kv electrons.
Question 11.1: Find the maximum frequency, and minimum wavelength of X-rays produced by 30 kv electrons. Potential of the electrons, V = 30 kv = 3 10 4 V Hence, energy of the electrons, E = 3 10 4 ev Where,
More informationExtracting Atomic and Molecular Parameters From the de Broglie Bohr Model of the Atom
Extracting Atomic and Molecular Parameters From te de Broglie Bor Model of te Atom Frank ioux Te 93 Bor model of te ydrogen atom was replaced by Scrödingerʹs wave mecanical model in 96. However, Borʹs
More informationChapter 37 Early Quantum Theory and Models of the Atom. Copyright 2009 Pearson Education, Inc.
Chapter 37 Early Quantum Theory and Models of the Atom Planck s Quantum Hypothesis; Blackbody Radiation Photon Theory of Light and the Photoelectric Effect Energy, Mass, and Momentum of a Photon Compton
More informationGraviton Induced Nuclear Fission through Electromagnetic Wave Flux Phil Russell, * Jerry Montgomery
Graviton Induced Nuclear Fission troug Electromagnetic Wave Flux Pil Russell, * Jerry Montgomery Nort Carolina Central University, Duram, NC 27707 Willowstick Tecnologies LLC, Draper, UT 84020 (Dated:
More informationProblem Set 3: Solutions
University of Alabama Department of Pysics and Astronomy PH 253 / LeClair Spring 2010 Problem Set 3: Solutions 1. Te energy required to break one OO bond in ozone O 3, OOO) is about 500 kj/mol. Wat is
More informationDept. of Physics, MIT Manipal 1
Chapter 1: Optics 1. In the phenomenon of interference, there is A Annihilation of light energy B Addition of energy C Redistribution energy D Creation of energy 2. Interference fringes are obtained using
More informationThe Electromagnetic Spectrum. Today
Today Announcements: HW#7 is due after Spring Break on Wednesday Marc 1 t Exam # is on Tursday after Spring Break Te fourt extra credit project will be a super bonus points project. Tis extra credit can
More informationChapter 37 Early Quantum Theory and Models of the Atom
Chapter 37 Early Quantum Theory and Models of the Atom Units of Chapter 37 37-7 Wave Nature of Matter 37-8 Electron Microscopes 37-9 Early Models of the Atom 37-10 Atomic Spectra: Key to the Structure
More informationChapters 31 Atomic Physics
Chapters 31 Atomic Physics 1 Overview of Chapter 31 Early Models of the Atom The Spectrum of Atomic Hydrogen Bohr s Model of the Hydrogen Atom de Broglie Waves and the Bohr Model The Quantum Mechanical
More informationTutorial 2 (Solution) 1. An electron is confined to a one-dimensional, infinitely deep potential energy well of width L = 100 pm.
Seester 007/008 SMS0 Modern Pysics Tutorial Tutorial (). An electron is confined to a one-diensional, infinitely deep potential energy well of widt L 00 p. a) Wat is te least energy te electron can ave?
More informationChapter 27 Early Quantum Theory and Models of the Atom Discovery and Properties of the electron
Chapter 27 Early Quantum Theory and Models of the Atom 27-1 Discovery and Properties of the electron Measure charge to mass ratio e/m (J. J. Thomson, 1897) When apply magnetic field only, the rays are
More informationPSI AP Physics How was it determined that cathode rays possessed a negative charge?
PSI AP Physics 2 Name Chapter Questions 1. How was it determined that cathode rays possessed a negative charge? 2. J. J. Thomson found that cathode rays were really particles, which were subsequently named
More informationCHAPTER 4 QUANTUM PHYSICS
CHAPTER 4 QUANTUM PHYSICS INTRODUCTION Newton s corpuscular teory of ligt fails to explain te penomena like interference, diffraction, polarization etc. Te wave teory of ligt wic was proposed by Huygen
More information1. The most important aspects of the quantum theory.
Lecture 5. Radiation and energy. Objectives: 1. The most important aspects of the quantum theory: atom, subatomic particles, atomic number, mass number, atomic mass, isotopes, simplified atomic diagrams,
More information1. (i) Calculate the number of electrons which will together weigh one gram. (ii) Calculate the mass and charge of one mole of electrons.
1. (i) Calculate the number of electrons which will together weigh one gram. (ii) Calculate the mass and charge of one mole of electrons. (i) 9.11 10-28 g is the mass of 1 electron No. of electrons 1 g
More informationChapter 28. Atomic Physics
Chapter 28 Atomic Physics Quantum Numbers and Atomic Structure The characteristic wavelengths emitted by a hot gas can be understood using quantum numbers. No two electrons can have the same set of quantum
More informationMODERN PHYSICS. 1 v 2. Kmax
MODERN PHYSICS PRACTICE QUESTIONS ( PHOTO ELECTRIC EFFECT ) Pg No 18 1) Define 'intensity' of radiation in photon picture of light. [Comptt. Delhi 2012] SOL: It is the number of photo electrons emitted
More informationChemistry. Slide 1 / 72. Slide 2 / 72. Slide 3 / 72. Atomic Structures Practice Problems
Slide 1 / 72 Slide 2 / 72 Chemistry Atomic Structures Practice Problems 2015-10-27 www.njctl.org 1 According to Einstein s view of matter and energy, what is the common link between light and matter? Slide
More informationQuantum Physics and Atomic Models Chapter Questions. 1. How was it determined that cathode rays possessed a negative charge?
Quantum Physics and Atomic Models Chapter Questions 1. How was it determined that cathode rays possessed a negative charge? 2. J. J. Thomson found that cathode rays were really particles, which were subsequently
More informationClass XII Chapter 11 - Dual Nature Of Radiation And Matter Physics
Question 11.1: Find the (a) maximum frequency, and (b) minimum wavelength of X-rays produced by 30 kv electrons. Potential of the electrons, V = 30 kv = 3 10 4 V Hence, energy of the electrons, E = 3 10
More informationQuantum Numbers and Rules
OpenStax-CNX module: m42614 1 Quantum Numbers and Rules OpenStax College Tis work is produced by OpenStax-CNX and licensed under te Creative Commons Attribution License 3.0 Abstract Dene quantum number.
More information3. Anaemia can be diagnosed by (a) 15 P 31 (b) 15 P 32 (c) 26 Fe 59 (d) 11 Na 24. (b) α particle (Alpha particle)
MARCH 2010 PHYSICS Time Allowed: 3 Hours Maximum Marks: 150 PART - I 30 x 1 = 30 Note: i) Answer all the questions. ii) Choose and write the correct answer. 1. Electron microscope works on the principle
More informationQuantum Mechanics and Atomic Theory
A. Electromagnetic Radiation Quantum Mecanics and Atomic Teory 1. Ligt: consists of waves of oscillating electric field ( E ) and magnetic field ( B ) tat are perpendicular to eac oter and to te direction
More informationPHYSICS 3204 PUBLIC EXAM QUESTIONS (Quantum pt.1)
PHYSICS 3204 PUBLIC EXAM QUESTIONS (Quantum pt.1) NAME: August 2009--------------------------------------------------------------------------------------------------------------------------------- 11 41.
More informationI. Multiple Choice Questions (Type-I)
I. Multiple Choice Questions (Type-I) 1. Which of the following conclusions could not be derived from Rutherford s α -particle scattering experiement? (i) Most of the space in the atom is empty. (ii) The
More informationChapter 22 Quantum Mechanics & Atomic Structure 22.1 Photon Theory of Light and The Photoelectric Effect Homework # 170
22.1 Photon Theory of Light and The Photoelectric Effect Homework # 170 See Homework #95 in "Chapter 12-Electrostatics" for the table of "Useful nformation" on atomic particles. 01. What is the energy
More informationLasers & Optical Fibers
Lasers & Optical Fibers 1. Emmission of a poton by an excited atom due to interaction wit passing poton nearby is called A) Spontaneous emission B) Stimulated emission C) induced absorption D) termionic
More informationReminder: Exam 3 Friday, July 6. The Compton Effect. General Physics (PHY 2140) Lecture questions. Show your work for credit.
General Pysics (PHY 2140) Lecture 15 Modern Pysics Cater 27 1. Quantum Pysics Te Comton Effect Potons and EM Waves Wave Proerties of Particles Wave Functions Te Uncertainty Princile Reminder: Exam 3 Friday,
More informationHomework 1. L φ = mωr 2 = mυr, (1)
Homework 1 1. Problem: Streetman, Sixt Ed., Problem 2.2: Sow tat te tird Bor postulate, Eq. (2-5) (tat is, tat te angular momentum p θ around te polar axis is an integer multiple of te reduced Planck constant,
More informationLecture: Experimental Solid State Physics Today s Outline
Lecture: Experimental Solid State Pysics Today s Outline Te quantum caracter of particles : Wave-Particles dualism Heisenberg s uncertainty relation Te quantum structure of electrons in atoms Wave-particle
More informationSIMG Solution Set #5
SIMG-303-0033 Solution Set #5. Describe completely te state of polarization of eac of te following waves: (a) E [z,t] =ˆxE 0 cos [k 0 z ω 0 t] ŷe 0 cos [k 0 z ω 0 t] Bot components are traveling down te
More informationTHE EDUCARE (SIROHI CLASSES) TEST SERIES 2018
THE EDUCARE (SIROHI CLASSES) TEST SERIES 2018 XII PHYSICS TEST MODERN PHYSICS NAME-... DATE-.. MM- 25 TIME-1 HR 1) Write one equation representing nuclear fusion reaction. (1) 2) Arrange radioactive radiations
More informationHigher Physics. Particles and Waves
Perth Academy Physics Department Higher Physics Particles and Waves Particles and Waves Homework Standard Model 1 Electric Fields and Potential Difference 2 Radioactivity 3 Fusion & Fission 4 The Photoelectric
More informationDo Now: Bohr Diagram, Lewis Structures, Valence Electrons 1. What is the maximum number of electrons you can fit in each shell?
Chemistry Ms. Ye Name Date Block Do Now: Bohr Diagram, Lewis Structures, Valence Electrons 1. What is the maximum number of electrons you can fit in each shell? 1 st shell 2 nd shell 3 rd shell 4 th shell
More informationChemistry. Slide 1 / 63 Slide 2 / 63. Slide 4 / 63. Slide 3 / 63. Slide 6 / 63. Slide 5 / 63. Optional Review Light and Matter.
Slide 1 / 63 Slide 2 / 63 emistry Optional Review Ligt and Matter 2015-10-27 www.njctl.org Slide 3 / 63 Slide 4 / 63 Ligt and Sound Ligt and Sound In 1905 Einstein derived an equation relating mass and
More information2.2 WAVE AND PARTICLE DUALITY OF RADIATION
Quantum Mecanics.1 INTRODUCTION Te motion of particles wic can be observed directly or troug microscope can be explained by classical mecanics. But wen te penomena like potoelectric effect, X-rays, ultraviolet
More informationExample of a Plane Wave LECTURE 22
Example of a Plane Wave http://www.acs.psu.edu/drussell/demos/evanescentwaves/plane-x.gif LECTURE 22 EM wave Intensity I, pressure P, energy density u av from chapter 30 Light: wave or particle? 1 Electromagnetic
More informationAP Chapter 6 Study Questions
Class: Date: AP Chapter 6 Study Questions True/False Indicate whether the statement is true or false. 1. The wavelength of radio waves can be longer than a football field. 2. Black body radiation is the
More informationChapter 31 Atomic Physics
100 92 86 100 92 84 100 92 84 98 92 83 97 92 82 96 91 80 96 91 76 95 91 74 95 90 68 95 89 67 95 89 66 94 87 93 86 No. of Students in Range Exam 3 Score Distribution 25 22 20 15 10 10 5 3 2 0 0 0 0 0 0
More informationSECTION A Quantum Physics and Atom Models
AP Physics Multiple Choice Practice Modern Physics SECTION A Quantum Physics and Atom Models 1. Light of a single frequency falls on a photoelectric material but no electrons are emitted. Electrons may
More informationPearson Physics Level 30 Unit VII Electromagnetic Radiation: Unit VII Review Solutions
Pearson Pysics Level 30 Unit VII Electromagnetic Radiation: Unit VII Review Solutions Student Book pages 746 749 Vocabulary 1. angle of diffraction: te angle formed between te perpendicular bisector and
More information1. What is the minimum energy required to excite a mercury atom initially in the ground state? ev ev ev
Page 1 of 10 modern bank Name 25-MAY-05 1. What is the minimum energy required to excite a mercury atom initially in the ground state? 1. 4.64 ev 3. 10.20 ev 2. 5.74 ev 4. 10.38 ev 2. The diagram represents
More informationElectronic structure of atoms
Chapter 1 Electronic structure of atoms light photons spectra Heisenberg s uncertainty principle atomic orbitals electron configurations the periodic table 1.1 The wave nature of light Much of our understanding
More informationHigher -o-o-o- Past Paper questions o-o-o- 3.4 Spectra
Higher -o-o-o- Past Paper questions 1991-2010 -o-o-o- 3.4 Spectra 1992 Q37 The diagram below shows the energy levels for the hydrogen atom. (a) Between which two energy levels would an electron transition
More informationChapter 24 Photonics Question 1 Question 2 Question 3 Question 4 Question 5
Chapter 24 Photonics Data throughout this chapter: e = 1.6 10 19 C; h = 6.63 10 34 Js (or 4.14 10 15 ev s); m e = 9.1 10 31 kg; c = 3.0 10 8 m s 1 Question 1 Visible light has a range of photons with wavelengths
More informationCHEMISTRY Topic #1: Atomic Structure and Nuclear Chemistry Fall 2017 Dr. Susan Findlay See Exercises 3.1 to 3.3
CHEMISTRY 1000 Topic #1: Atomic Structure and Nuclear Chemistry Fall 2017 Dr. Susan Findlay See Exercises 3.1 to 3.3 Light: Wave? Particle? Both! Modern models of the atom were derived by studying the
More informationHigher Derivatives. Differentiable Functions
Calculus 1 Lia Vas Higer Derivatives. Differentiable Functions Te second derivative. Te derivative itself can be considered as a function. Te instantaneous rate of cange of tis function is te second derivative.
More informationParticle nature of light & Quantization
Particle nature of light & Quantization A quantity is quantized if its possible values are limited to a discrete set. An example from classical physics is the allowed frequencies of standing waves on a
More informationAn element Is a substance that cannot be split into simpler substance. It is composed of discrete particles called atoms.
digitalteachers.co.ug Atomic structure Inorganic chemistry deals with the physical and chemical properties of the elements of the the periodic table. An element Is a substance that cannot be split into
More informationDUAL NATURE OF RADIATION AND MATTER
Chapter Eleven DUAL NATURE OF RADIATION AND MATTER MCQ I 111 A particle is dropped from a height H The de Broglie wavelength of the particle as a function of height is proportional to (a) H (b) H 1/2 (c)
More informationRb, which had been compressed to a density of 1013
Modern Physics Study Questions for the Spring 2018 Departmental Exam December 3, 2017 1. An electron is initially at rest in a uniform electric field E in the negative y direction and a uniform magnetic
More informationCh 7 Quantum Theory of the Atom (light and atomic structure)
Ch 7 Quantum Theory of the Atom (light and atomic structure) Electromagnetic Radiation - Electromagnetic radiation consists of oscillations in electric and magnetic fields. The oscillations can be described
More informationReview: Properties of a wave
Radiation travels as waves. Waves carry information and energy. Review: Properties of a wave wavelength (λ) crest amplitude (A) trough velocity (v) λ is a distance, so its units are m, cm, or mm, etc.
More informationName : Roll No. :.. Invigilator s Signature :.. CS/B.Tech/SEM-2/PH-201/2010 2010 ENGINEERING PHYSICS Time Allotted : 3 Hours Full Marks : 70 The figures in the margin indicate full marks. Candidates are
More informationLecture 11 Atomic Structure
Lecture 11 Atomic Structure Earlier in the semester, you read about the discoveries that lead to the proposal of the nuclear atom, an atom of atomic number Z, composed of a positively charged nucleus surrounded
More informationChapter 39. Particles Behaving as Waves
Chapter 39 Particles Behaving as Waves 39.1 Electron Waves Light has a dual nature. Light exhibits both wave and particle characteristics. Louis de Broglie postulated in 1924 that if nature is symmetric,
More informationSolution for the Homework 4
Solution for te Homework 4 Problem 6.5: In tis section we computed te single-particle translational partition function, tr, by summing over all definite-energy wavefunctions. An alternative approac, owever,
More informationMOCK CET PHYSICS PAPER 1
MOCK CET PHYSICS PAPER 1 1. Rotational kinetic energy of a body is given by the equation 2 2 where I is moment of inertia and ω angular velocity of the body. The dimensional formula of I using the above
More informationAstronomy The Nature of Light
Astronomy The Nature of Light A. Dayle Hancock adhancock@wm.edu Small 239 Office hours: MTWR 10-11am Measuring the speed of light Light is an electromagnetic wave The relationship between Light and temperature
More informationChapters 28 and 29: Quantum Physics and Atoms Questions & Problems
Chapters 8 and 9: Quantum Physics and Atoms Questions & Problems hc = hf = K = = hf = ev P = /t = N h h h = = n = n, n = 1,, 3,... system = hf photon p mv 8 ml photon max elec 0 0 stop total photon 91.1nm
More informationThe Photoelectric Effect
Stellar Astrophysics: The Interaction of Light and Matter The Photoelectric Effect Methods of electron emission Thermionic emission: Application of heat allows electrons to gain enough energy to escape
More informationPhysics 126 Practice Exam #4 Professor Siegel
Physics 126 Practice Exam #4 Professor Siegel Name: Lab Day: 1. Light is usually thought of as wave-like in nature and electrons as particle-like. In which one of the following instances does light behave
More informationWave Motion and Sound
Wave Motion and Sound 1. A back and forth motion that repeats itself is a a. Spring b. Vibration c. Wave d. Pulse 2. The number of vibrations that occur in 1 second is called a. A Period b. Frequency c.
More informationWhich of the following classes of electromagnetic waves will not ionise neutral atoms?
1 In an experiment to demonstrate the photoelectric effect, a charged metal plate is illuminated with light from different sources. The plate loses its charge when an ultraviolet light source is used but
More informationPHYSICS FORM 5 PHYSICS OF THE ATOM
The Shell Model and The Periodic Table PHYSICS The Rutherford-Bohr model of the atom shed light on the arrangement of the periodic table of the elements. The orbits which electrons were allowed to occupy
More informationDownloaded from
7. DUAL NATURE OF MATTER & RADIATION GIST ELECTRON EMISSION 1. There are three types of electron emission, namely, Thermionic Emission, Photoelectric Emission and Field Emission. 2. The minimum energy
More informationDual Nature of Matter and Radiation 9. The work function of a certain metal is 3.3 J. Then the maximum kinetic energy of photoelectrons emitted by incident radiation of wavelength 5 A is- ).48 ev ).4 ev
More informationWAVE NATURE OF LIGHT
WAVE NATURE OF LIGHT Light is electromagnetic radiation, a type of energy composed of oscillating electric and magnetic fields. The fields oscillate perpendicular to each other. In vacuum, these waves
More information