Modern Physics. Ans: 1. According to de broglie hypothesis, any moving particle is associated with a wave.
|
|
- Dominic Stewart
- 5 years ago
- Views:
Transcription
1 Modern Physics Q1. What is matter wave? Or What is De broglie hypothesis? Ans: 1. According to de broglie hypothesis, any moving particle is associated with a wave. 2. The waves associated with a particle is called matter wave/de broglie wave. 3.Wavelength associated with the matter wave is called de broglie wavelength. h λ= Or λ = h mv p m= mass of the particle v= velocity of the particle p=mv= momentum of the particle. Q2. Derive the expression for de-broglie wavelgth. Ans: E = hν=hc/ hv/ E = mc2 = mv =2 hv/ = mv2. Cancel v. h/ = mv since h/ = p = h/p mv = p.
2 Q3. Expression for de broglie wavelgth in different forms.
3 Q4. Write the properties of Matter waves. Q5: Describe the Davission Germer expriment for the proof of wave nature of matter Or Describe the Davission Germer expriment for the exprimental evidence of matter waves. Ans: 1. Experimental arrangement consist of filament, Ni crystal, detector. 2. Electron beam (electrons) are generated from the filament by passing high current through it. When filament gets heated up, it emits electrons. 3. Emitted electrons are accelerated by potential (voltage) applied between filament and the anode. 4. Accelerated electron beam is allowed to fall on the Ni crystal. 5. These electrons are scattered by Ni crystal in all the directions.
4 6. The detector D measures the number of electrons scattered by the crystal in different directions/angles (0 90 degrees). 7. Experiment was performed for different accelerated potentials. 8. At 54V accelearting voltage, intensity graph have shown below. It is cleared that at 50 degrees, a intense hump (intense peak) is observed. This indicates that electrons are scattered more. This behaviour is not observed for other accelerating voltages. Intensity Peak /hump At 54 V Ф Ф=50 Ф O 9. If you calculate wave length associated with electrons at 54 V = 1.66 Å From below figure, we can measure angle of incidence of electron beam on the Ni crystal planes and it is found that 65 degrees. Or 11. Substitute above values in braggs law of x-ray diffraction According to braggs law 2dsinθ=nλ d=0.91 Å, n=1, θ=65o λ= 1.65 Å from the values of wavelength obtianed by equation 1 (De-broglie) and 2 (braggs) are same/agreed well.
5 13. Therefore, this experiment gave a evidence that electrons exhibit diffraction (wave nature). This implies the existance of matter waves. Q6: Describe the G P Thomson's expriment for the proof of wave nature of matter Or Describe the G P Thomson's expriment for the exprimental evidence of matter waves. Ans: 1. Experimental arrangment consist of Filament (F), Anode (A), Photograhic plate (P), Thin gold foil (G) (Poly crystalline) and Metal block (B). 2. Electrons are produced from the heated filament (F) and accelerated through high potentail given to the anode (A). 3. Electron beam passes through a fine hole in metal block (B) and falls on the gold foil of thickness 0.1 μm. The electron are passing through foils are received on the photographic plate (P). 4. Metals are poly crystalline in which grains are oriented randomaly and some grains always satisfies braggs law with respect to the incident electron beam angle and produce the braggs reflection. 5. A concentric ring pattern is produced on the photographic plate like as shown in below. 6. X-ray diffraction pattern of powder (poly crystalline) samples is shown in below.
6 Form above two figures, the diffraction pattern produced by electron beam is similar to the x-ray diffraction pattern produced using x-rays. Therefore, this experiment provides the evidence for the wave nature of electron. Which implies the existance/evidence of matter waves. Q7. Explain the terms (a) Wave packet (b) Group velocity (c) Phase velocity. Ans: (a) Wavepacket: It is representation of matter wave associated with a particle. Which is represnted bleow Wave packet is the resultant of superpostion of large number of harmonic waves slightly differ in frequency (b) Group velocity (Vg): The velocity with which wave packet advances (moving) in the medium is called group velocity. Vg = dω dk
7 (c) Phase velocity (Vp): The individual waves forming the wave packet propogate at a velocity known as the phase velocity (V p) Vp= ω/k Q8. What is Heisenberge uncertainity applications principle and write its Ans: Principle: It is impossible to measure both the position and momentum of a particle simulataneously and precisely. Δp Δx Other forms Application 1 h 4π ΔE Δt h 4π
8 Application 2 Application 3 Particle in a box : Let us consider a particle confined to a box of length l. The uncertainity Δx in the position is l Δx.ΔP h ΔP=h/l ( h cut/h bar) ( Δx=l )
9 E= P2/2m E= (ΔP)2/2m E= h2/2ml This Energy result agrees with the result obtained from the schrodinger wave equation. Q9. Derive the Schrodinger s equation. Ans: time independent wave
10
11
12 Q 10 Write physical significance of wave function. Ans: 1. It gives a statistical relationship between the particle and wave. 2. The probability of finding a particle within a volume dv P= ΨΨ* dv= Ψ 2dv dv=dxdydz, Ψ2 Gives the probability finding a particle. 3. When the particle definately exist in a volume P= 4. ΨΨ* dv=1 (Normalization condition ) When the particle does not exist in a volume P= ΨΨ* dv=0
13 Q11. Derive Schrodinger Equation for a particle in a one dimensional "box" and find its energy (eigen ) values, wave (eigen) functions and probability.
14
15
16
17 Q.12 Explain the formation of energy bands in solids
18
19 Q.13 Distingush between insulator, conductor, and semiconductor. 1. Conductors
20 2. Semiconductors 3. Insulator
21 Q. 14 Explain in detail the comparison among Maxwell Boltzmen (M-B), Fermi Dirac (F-D) and Bose-Einstein (BE) statistics
22 Q. 15 Define the tunneling phenomenon and find the transmission and reflection coefficient of the partcile (electron) in case of rectangular potential barrier. Or Explain the tunneling phenomenon in case of rectangular potential barrier. Ans: Defination : Quantum tunnelling or tunneling refers to the quantum mechanical phenomenon where a particle tunnels through a barrier that it classically could not not possible like as shown in the figure. Rectangular potential barrier: V=0 V=0 V(x)=V0 Region - I Region -III Region -II X=0 X=L
23
24 The-end
Quantum Mechanics Tutorial
Quantum Mechanics Tutorial The Wave Nature of Matter Wave-particle duality and de Broglie s hypothesis. de Broglie matter waves The Davisson-Germer experiment Matter wave packets Heisenberg uncertainty
More informationParticles and Waves Particles Waves
Particles and Waves Particles Discrete and occupy space Exist in only one location at a time Position and velocity can be determined with infinite accuracy Interact by collisions, scattering. Waves Extended,
More informationGeneral Physics (PHY 2140) Lecture 15
General Physics (PHY 2140) Lecture 15 Modern Physics Chapter 27 1. Quantum Physics The Compton Effect Photons and EM Waves Wave Properties of Particles Wave Functions The Uncertainty Principle http://www.physics.wayne.edu/~alan/2140website/main.htm
More informationWelcome back to PHY 3305
Welcome back to PHY 3305 Today s Lecture: Double Slit Experiment Matter Waves Louis-Victor-Pierre-Raymond, 7th duc de Broglie 1892-1987 Double-Slit Experiment Photons pass through the double-slit apparatus.
More informationChap. 3. Elementary Quantum Physics
Chap. 3. Elementary Quantum Physics 3.1 Photons - Light: e.m "waves" - interference, diffraction, refraction, reflection with y E y Velocity = c Direction of Propagation z B z Fig. 3.1: The classical view
More informationChapter 27. Quantum Physics
Chapter 27 Quantum Physics Need for Quantum Physics Problems remained from classical mechanics that relativity didn t explain Blackbody Radiation The electromagnetic radiation emitted by a heated object
More informationChapter 10: Wave Properties of Particles
Chapter 10: Wave Properties of Particles Particles such as electrons may demonstrate wave properties under certain conditions. The electron microscope uses these properties to produce magnified images
More informationPhysics 1C. Modern Physics Lecture
Physics 1C Modern Physics Lecture "I ask you to look both ways. For the road to a knowledge of the stars leads through the atom; and important knowledge of the atom has been reached through the stars."
More informationWave function and Quantum Physics
Wave function and Quantum Physics Properties of matter Consists of discreet particles Atoms, Molecules etc. Matter has momentum (mass) A well defined trajectory Does not diffract or interfere 1 particle
More informationDual Nature of Matter
Emission of electrons: Dual Nature of Matter We know that metals have free electrons (negatively charged particles) that are responsible for their conductivity. However, the free electrons cannot normally
More informationλ = h = h p mv λ = h mv FXA 2008 Candidates should be able to :
1 Candidates should be able to : Explain electron diffraction as evidence for the wave nature of particles like electrons. Explain that electrons travelling through polycrystalline graphite will be diffracted
More informationLECTURE 6 QUANTUM PHYSICS II. Instructor: Shih-Chieh Hsu
LECTURE 6 QUANTUM PHYSICS II Instructor: Shih-Chieh Hsu Development of Quantum Mechanics 2 In 1862, Kirchhoff coined black body radiation or known as cavity radiation The experiments raised the question
More informationCrystal Structure and Electron Diffraction
Crystal Structure and Electron Diffraction References: Kittel C.: Introduction to Solid State Physics, 8 th ed. Wiley 005 University of Michigan, PHY441-44 (Advanced Physics Laboratory Experiments, Electron
More informationPhysics 1C Lecture 28C. "For those who are not shocked when they first come across quantum theory cannot possibly have understood it.
Physics 1C Lecture 28C "For those who are not shocked when they first come across quantum theory cannot possibly have understood it." --Neils Bohr Outline CAPE and extra credit problems Wave-particle duality
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 informationPHY202 Quantum Mechanics. Topic 1. Introduction to Quantum Physics
PHY202 Quantum Mechanics Topic 1 Introduction to Quantum Physics Outline of Topic 1 1. Dark clouds over classical physics 2. Brief chronology of quantum mechanics 3. Black body radiation 4. The photoelectric
More informationWAVE PARTICLE DUALITY
WAVE PARTICLE DUALITY Evidence for wave-particle duality Photoelectric effect Compton effect Electron diffraction Interference of matter-waves Consequence: Heisenberg uncertainty principle PHOTOELECTRIC
More informationCHAPTER 5 Wave Properties of Matter and Quantum Mechanics I
CHAPTER 5 Wave Properties of Matter and Quantum Mechanics I 5.1 X-Ray Scattering 5.2 De Broglie Waves 5.3 Electron Scattering 5.4 Wave Motion 5.5 Waves or Particles? 5.6 Uncertainty Principle 5.7 Probability,
More informationThe University of Hong Kong Department of Physics
The University of Hong Kong Department of Physics Physics Laboratory PHYS3551 Introductory Solid State Physics Experiment No. 3551-2: Electron and Optical Diffraction Name: University No: This experiment
More informationGeneral Physics (PHY 2140)
General Physics (PHY 2140) Lecture 27 Modern Physics Quantum Physics Blackbody radiation Plank s hypothesis http://www.physics.wayne.edu/~apetrov/phy2140/ Chapter 27 1 Quantum Physics 2 Introduction: Need
More informationQuantum Physics Lecture 3
Quantum Physics Lecture 3 If light (waves) are particle-like, are particles wave-like? Electron diffraction - Davisson & Germer Experiment Particle in a box -Quantisation of energy Wave Particle?? Wave
More informationIn a particular investigation the atomic spacing of the crystal is m and the electrons are accelerated through 3000 V.
1 Crystal structure can be investigated using the diffraction of an electron beam. A typical diffraction pattern is shown. In a particular investigation the atomic spacing of the crystal is 2.3 10 11 m
More informationDual Nature of Radiation and Matter
PHYSICS NOTES Dual Nature of Radiation and Matter Emission of electrons: We know that metals have free electrons (negatively charged particles) that are responsible for their conductivity. However, the
More informationWave properties of matter & Quantum mechanics I. Chapter 5
Wave properties of matter & Quantum mechanics I Chapter 5 X-ray diffraction Max von Laue suggested that if x-rays were a form of electromagnetic radiation, interference effects should be observed. Crystals
More informationPHYS 3313 Section 001 Lecture #16
PHYS 3313 Section 001 Lecture #16 Monday, Mar. 24, 2014 De Broglie Waves Bohr s Quantization Conditions Electron Scattering Wave Packets and Packet Envelops Superposition of Waves Electron Double Slit
More informationDEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS
DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS LSN 12-1A: INTERACTIONS OF MATTER WITH RADIATION Questions From Reading Activity? Essential Idea: The microscopic quantum world offers a range of phenomena,
More informationQUANTUM PHYSICS. Limitation: This law holds well only for the short wavelength and not for the longer wavelength. Raleigh Jean s Law:
Black body: A perfect black body is one which absorbs all the radiation of heat falling on it and emits all the radiation when heated in an isothermal enclosure. The heat radiation emitted by the black
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 informationUNIT-III QUANTUM PHYSICS
UNIT-III QUANTUM PHYSICS SYLLABUS Black body radiation Planck s theory (derivation) Deduction of Wien s displacement law and Rayleigh Jeans Law from Planck s theory Compton Effect-Theory and experimental
More informationSEMICONDUCTOR PHYSICS
SEMICONDUCTOR PHYSICS by Dibyendu Chowdhury Semiconductors The materials whose electrical conductivity lies between those of conductors and insulators, are known as semiconductors. Silicon Germanium Cadmium
More informationPHYS 571 Radiation Physics
PHYS 571 Radiation Physics Prof. Gocha Khelashvili http://blackboard.iit.edu login Bohr s Theory of Hydrogen Atom Bohr s Theory of Hydrogen Atom Bohr s Theory of Hydrogen Atom Electrons can move on certain
More informationSemiconductor Physics and Devices
Introduction to Quantum Mechanics In order to understand the current-voltage characteristics, we need some knowledge of electron behavior in semiconductor when the electron is subjected to various potential
More informationThe wavefunction ψ for an electron confined to move within a box of linear size L = m, is a standing wave as shown.
1. This question is about quantum aspects of the electron. The wavefunction ψ for an electron confined to move within a box of linear size L = 1.0 10 10 m, is a standing wave as shown. State what is meant
More information( ) # velocity. Wavelengths of massive objects. From Last Time. Wavelength of electron. Wavelength of 1 ev electron. A little complicated ( ) " = h mv
From Last Time Wavelengths of massive objects Light shows both particle and wavelike properties Matter shows both particle and wavelike properties. How can we make sense of this? debroglie wavelength =
More informationModern Physics for Scientists and Engineers International Edition, 4th Edition
Modern Physics for Scientists and Engineers International Edition, 4th Edition http://optics.hanyang.ac.kr/~shsong Review: 1. THE BIRTH OF MODERN PHYSICS 2. SPECIAL THEORY OF RELATIVITY 3. THE EXPERIMENTAL
More informationChapter (5) Matter Waves
Chapter (5) Matter Waves De Broglie wavelength Wave groups Consider a one- dimensional wave propagating in the positive x- direction with a phase speed v p. Where v p is the speed of a point of constant
More information12 - DUAL NATURE OF RADIATION AND MATTER Page 1
1 - DUAL NATURE OF RADIATION AND MATTER Page 1 1.1 Birth of Modern Physics By 1880, most physicists thought that important laws in physics were already discovered and all that remained was their refined
More informationWave nature of particles
Wave nature of particles We have thus far developed a model of atomic structure based on the particle nature of matter: Atoms have a dense nucleus of positive charge with electrons orbiting the nucleus
More informationDual Nature of Radiation and Matter GLIMPSES 1. Electron. It is an elementary particle having a negative charge of 1.6x C and mass 9.1x kg
Dual Nature of Radiation and Matter GLIMPSES 1. Electron. It is an elementary particle having a negative charge of 1.6x 10-19 C and mass 9.1x 10-31 kg... Work function. The minimum amount of energy required
More informationClass 21. Early Quantum Mechanics and the Wave Nature of Matter. Physics 106. Winter Press CTRL-L to view as a slide show. Class 21.
Early and the Wave Nature of Matter Winter 2018 Press CTRL-L to view as a slide show. Last Time Last time we discussed: Optical systems Midterm 2 Today we will discuss: Quick of X-ray diffraction Compton
More informationChapter 38. Photons Light Waves Behaving as Particles
Chapter 38 Photons Light Waves Behaving as Particles 38.1 The Photoelectric Effect The photoelectric effect was first discovered by Hertz in 1887, and was explained by Einstein in 1905. The photoelectric
More informationDEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS
DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS TSOKOS LESSON 1-1B: THE INTERACTION OF MATTER WITH RADIATION Introductory Video Quantum Mechanics Essential Idea: The microscopic quantum world offers
More informationFundamental of Spectroscopy for Optical Remote Sensing Xinzhao Chu I 10 3.4. Principle of Uncertainty Indeterminacy 0. Expression of Heisenberg s Principle of Uncertainty It is worth to point out that
More informationChapter 38 Quantum Mechanics
Chapter 38 Quantum Mechanics Units of Chapter 38 38-1 Quantum Mechanics A New Theory 37-2 The Wave Function and Its Interpretation; the Double-Slit Experiment 38-3 The Heisenberg Uncertainty Principle
More information8.04 Spring 2013 February 13, 2013 Problem 1. (15 points) Radiative collapse of a classical atom
Problem Set 1 Solutions 8.04 Spring 01 February 1, 01 Problem 1. (15 points) Radiative collapse of a classical atom (a) (5 points) We begin by assuming that the orbit is circular. This seems like circular
More informationModel Question Paper ENGINEERING PHYSICS (14PHY12/14PHY22) Note: Answer any FIVE full questions, choosing one full question from each module.
Model Question Paper ENGINEERING PHYSICS (14PHY1/14PHY) Time: 3 hrs. Max. Marks: 100 Note: Answer any FIVE full questions, choosing one full question from each module. MODULE 1 1) a. Explain in brief Compton
More informationWave Nature of Matter
Wave Nature of Matter Wave-Particle Duality de Broglie proposed that particles with momentum could have an associated wavelength (converse of photons having momentum) de Broglie wavelength h λ = p or p
More informationAtomic and Nuclear Physics
Atomic and Nuclear Physics Introductory experiments ualism of wave and particle L Physics Leaflets P6.1.5.1 iffraction of electrons in a polycrystalline lattice (ebye-scherrer diffraction) Objects of the
More informationNuclear Fusion and Radiation
Nuclear Fusion and Radiation Lecture 2 (Meetings 3 & 4) Eugenio Schuster schuster@lehigh.edu Mechanical Engineering and Mechanics Lehigh University Nuclear Fusion and Radiation p. 1/41 Modern Physics Concepts
More informationLecture Outline Chapter 30. Physics, 4 th Edition James S. Walker. Copyright 2010 Pearson Education, Inc.
Lecture Outline Chapter 30 Physics, 4 th Edition James S. Walker Chapter 30 Quantum Physics Units of Chapter 30 Blackbody Radiation and Planck s Hypothesis of Quantized Energy Photons and the Photoelectric
More informationDUAL NATURE OF RADIATION AND MATTER I K GOGIA KV JHARODA KALAN DELHI.
DUAL NATURE OF RADIATION AND MATTER AIM: The aim of present self- learning module is to train the minds of the learners in building the concepts by learning on their own. The module is designed to Achieve
More informationLecture 35 (de Broglie & Matter Waves) Physics Fall 2018 Douglas Fields
Lecture 35 (de Broglie & Matter Waves) Physics 6-01 Fall 018 Douglas Fields Clicker Quiz For a certain metal, the work function is 4eV. If light at frequency 1.9x10 15 Hz strikes the metal, what is the
More informationEvidence that x-rays are wave-like
Evidence that x-rays are wave-like After their discovery in 1895 by Roentgen, their spectrum (including characteristic x-rays) was probed and their penetrating ability was exploited, but it was difficult
More informationChapter 3. Wave Properties of Particles
Chapter 3 Wave Properties of Particles 1 The Wave Debate Wave-ists Particle-ists Maxwell s Equations Interference Diffraction E = hf, p = h/ Photoelectric Compton Effect 2 3 3.1 De Broglie waves A moving
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 information5.111 Principles of Chemical Science
MIT OpenCourseWare http://ocw.mit.edu 5.111 Principles of Chemical Science Fall 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms. 5.111 Lecture Summary
More informationHigh-Resolution. Transmission. Electron Microscopy
Part 4 High-Resolution Transmission Electron Microscopy 186 Significance high-resolution transmission electron microscopy (HRTEM): resolve object details smaller than 1nm (10 9 m) image the interior of
More informationPlanck s Quantum Hypothesis Blackbody Radiation
Planck s Quantum Hypothesis Blackbody Radiation The spectrum of blackbody radiation has been measured(next slide); it is found that the frequency of peak intensity increases linearly with temperature.
More information(b) State the characteristics of photon. 2 Solution:
Max Marks 40 ENGINEERING PHYSICS / VRK/KS/14/6549 Faculty of Engineering and Technology RTMNU SUMMER - 014 PAPER SOLUTION First Semester B.E. (C.B.S.)Examination ENGINEERING PHYSICS Q. 1. (a) What is Compton
More informationChapter 4: The Wave Nature of Matter
Chapter 4: The Wave Nature of Matter q We have seen in Chap. 3 that EM radiation displays both wave properties (classical description) and particle properties (quantum description) q Matter is described
More information12/04/2012. Models of the Atom. Quantum Physics versus Classical Physics The Thirty-Year War ( )
Quantum Physics versus Classical Physics The Thirty-Year War (1900-1930) Interactions between Matter and Radiation Models of the Atom Bohr s Model of the Atom Planck s Blackbody Radiation Models of the
More informationLecture 2: Quantum Mechanics and Relativity
Lecture 2: Quantum Mechanics and Relativity Atom Atomic number A Number of protons Z Number of neutrons A-Z Number of electrons Z Charge of electron = charge of proton ~1.6 10-19 C Size of the atom ~10-10
More informationWave Motion and Electromagnetic Radiation. Introduction Jan. 18, Jie Zhang
Wave Motion and Electromagnetic Radiation Introduction Jan. 18, 2010 Jie Zhang PHYS 306 Spring, 2010 Introduction This class is about the physics of LIGHT. Textbook: Optics by Ghatak (2010) Content What
More informationWhich of the following can be used to calculate the resistive force acting on the brick? D (Total for Question = 1 mark)
1 A brick of mass 5.0 kg falls through water with an acceleration of 0.90 m s 2. Which of the following can be used to calculate the resistive force acting on the brick? A 5.0 (0.90 9.81) B 5.0 (0.90 +
More informationDiffraction of Electrons
Diffraction of Electrons Object: Apparatus: Verify that electrons are waves; i.e., that they diffract just like light waves. This lab is then used to measure their wavelength or, alternatively, measure
More informationChapter 1 X-ray Absorption Fine Structure (EXAFS)
1 Chapter 1 X-ray Absorption Fine Structure (EXAFS) 1.1 What is EXAFS? X-ray absorption fine structure (EXAFS, XAFS) is an oscillatory modulation in the X-ray absorption coefficient on the high-energy
More informationThe Wave Nature of Matter *
OpenStax-CNX module: m42576 1 The Wave Nature of Matter * OpenStax This work is produced by OpenStax-CNX and licensed under the Creative Commons Attribution License 3.0 Abstract Describe the Davisson-Germer
More informationElectron Diffraction
Exp-3-Electron Diffraction.doc (TJR) Physics Department, University of Windsor Introduction 64-311 Laboratory Experiment 3 Electron Diffraction In 1924 de Broglie predicted that the wavelength of matter
More informationQUANTUM PHYSICS II. Challenging MCQ questions by The Physics Cafe. Compiled and selected by The Physics Cafe
QUANTUM PHYSICS II Challenging MCQ questions by The Physics Cafe Compiled and selected by The Physics Cafe 1 Suppose Fuzzy, a quantum-mechanical duck of mass 2.00 kg, lives in a world in which h, the Planck
More informationWavelength of 1 ev electron
HW8: M Chap 15: Question B, Exercises 2, 6 M Chap 16: Question B, Exercises 1 M Chap 17: Questions C, D From Last Time Essay topic and paragraph due Friday, Mar. 24 Light waves are particles and matter
More informationPhysics 43 Exam 2 Spring 2018
Physics 43 Exam 2 Spring 2018 Print Name: Conceptual Circle the best answer. (2 points each) 1. Quantum physics agrees with the classical physics limit when a. the total angular momentum is a small multiple
More informationChapter 38. Photons and Matter Waves
Chapter 38 Photons and Matter Waves The sub-atomic world behaves very differently from the world of our ordinary experiences. Quantum physics deals with this strange world and has successfully answered
More informationPreview from Notesale.co.uk Page 4 of 35
field 64 If a dielectric is inserted b/w the plates of a charged capacitor, its Remains Becomes infinite capacitance constant decreases increases 65 Selenium is an insulator in the dark but when exposed
More informationNotes for Class Meeting 19: Uncertainty
Notes for Class Meeting 19: Uncertainty Uncertainty in Momentum and Position In 1926, Werner Heisenberg formulated the uncertainty principle: It is impossible to determine both the momentum and position
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 informationChapter 1. From Classical to Quantum Mechanics
Chapter 1. From Classical to Quantum Mechanics Classical Mechanics (Newton): It describes the motion of a classical particle (discrete object). dp F ma, p = m = dt dx m dt F: force (N) a: acceleration
More informationQuantum Interference and Duality
Quantum Interference and Duality Kiyohide NOMURA Department of Physics December 21, 2016 1 / 49 Quantum Physics(Mechanics) Basic notion of Quantum Physics: Wave-Particle Duality Light (electromagnetic
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 informationCHAPTER 12 TEST REVIEW
IB PHYSICS Name: Period: Date: # Marks: 76 Raw Score: IB Curve: DEVIL PHYSICS BADDEST CLASS ON CAMPUS CHAPTER 12 TEST REVIEW 1. An alpha particle is accelerated through a potential difference of 10 kv.
More informationde Broglie Waves h p de Broglie argued Light exhibits both wave and particle properties
de Broglie argued de Broglie Waves Light exhibits both wave and particle properties Wave interference, diffraction Particle photoelectric effect, Compton effect Then matter (particles) should exhibit both
More informationEpisode 506: Particles as waves
Episode 506: Particles as waves This episode introduces an important phenomenon: wave - particle duality. In studying the photoelectric effect, students have learned that light, which we think of as waves,
More informationLecture PowerPoints. Chapter 27 Physics: Principles with Applications, 7th edition Giancoli
Lecture PowerPoints Chapter 27 Physics: Principles with Applications, 7th edition Giancoli This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching
More informationAtomic Spectra. if you pass white light through a gas dark narrow lines on a bright continuum "Absorption spectrum"
By the end of the 1800 s, classical physics had many successes. One prominent physicist even had suggested that all that remained was to further increase the significant digits for measurements. However,
More information5.111 Lecture Summary #4 Wednesday, September 10, 2014
5.111 Lecture Summary #4 Wednesday, September 10, 2014 Reading for today: Section 1.5 and Section 1.6. (Same sections in 5 th and 4 th editions) Read for Lecture #5: Section 1.3 Atomic Spectra, Section
More informationGeneral Physics (PHY 2140) Lecture 14
General Physics (PHY 2140) Lecture 14 Modern Physics 1. Relativity Einstein s General Relativity 2. Quantum Physics Blackbody Radiation Photoelectric Effect X-Rays Diffraction by Crystals The Compton Effect
More informationComplementi di Fisica Lectures 10, 11
Complementi di Fisica Lectures 10, 11 Livio Lanceri Università di Trieste Trieste, 07/08-11-2006 Course Outline - Reminder The physics of semiconductor devices: an introduction Quantum Mechanics: an introduction
More informationWelcome back to PHY 3305
Welcome back to PHY 3305 Today s Lecture: Uncertainty Principle Werner Heisenberg 1901-1976 When you perform an experiment, do you get the exact same result every time? No. There is a fundamental uncertainty
More information2. X-ray Sources 2.1 Electron Impact X-ray Sources - Types of X-ray Source - Bremsstrahlung Emission - Characteristic Emission
. X-ray Sources.1 Electron Impact X-ray Sources - Types of X-ray Source - Bremsstrahlung Emission - Characteristic Emission. Synchrotron Radiation Sources - Introduction - Characteristics of Bending Magnet
More informationDiscovery of the Atomic Nucleus. Conceptual Physics 11 th Edition. Discovery of the Electron. Discovery of the Atomic Nucleus
Conceptual Physics 11 th Edition Chapter 32: THE ATOM AND THE QUANTUM Discovery of the Atomic Nucleus These alpha particles must have hit something relatively massive but what? Rutherford reasoned that
More informationUnit title: Atomic and Nuclear Physics for Spectroscopic Applications
Unit title: Atomic and Nuclear Physics for Spectroscopic Applications Unit code: Y/601/0417 QCF level: 4 Credit value: 15 Aim This unit provides an understanding of the underlying atomic and nuclear physics
More informationChapter 7 Atomic Structure -1 Quantum Model of Atom. Dr. Sapna Gupta
Chapter 7 Atomic Structure -1 Quantum Model of Atom Dr. Sapna Gupta The Electromagnetic Spectrum The electromagnetic spectrum includes many different types of radiation which travel in waves. Visible light
More informationchmy361 Lec42 Tue 29nov16
chmy361 Lec42 Tue 29nov16 1 Quantum Behavior & Quantum Mechanics Applies to EVERYTHING But most evident for particles with mass equal or less than proton Absolutely NECESSARY for electrons and light (photons),
More informationWHAT DOES THE ATOM REALLY LOOK LIKE? THE THOMSON MODEL
WHAT DOES THE ATOM REALLY LOOK LIKE? THE THOMSON MODEL RUTHERFORD SCATTERING RUTHERFORD SCATTERING: SOME DETAILS RUTHERFORD SCATTERING: FINAL RESULTS N() = no. scattered into interval to +d N i = total
More informationAnnouncements. Lecture 8 Chapter. 3 Wave & Particles I. EM- Waves behaving like Particles. The Compton effect (Arthur Compton 1927) Hypothesis:
Announcements HW3: Ch.3-13, 17, 23, 25, 28, 31, 37, 38, 41, 44 HW3 due: 2/16 ** Lab manual is posted on the course web *** Course Web Page *** http://highenergy.phys.ttu.edu/~slee/2402/ Lecture Notes,
More informationElectronic Structure of Atoms. Chapter 6
Electronic Structure of Atoms Chapter 6 Electronic Structure of Atoms 1. The Wave Nature of Light All waves have: a) characteristic wavelength, λ b) amplitude, A Electronic Structure of Atoms 1. The Wave
More informationElectromagnetic Radiation
Chapter 6: The Periodic Table and Atomic Structure Electromagnetic Radiation Atomic Spectra The Bohr Atom Quantum Mechanical Model of the Atom Wave Mechanics Quantum Numbers and Electron Orbitals Interpreting
More informationThe Quantum Theory of Atoms and Molecules
The Quantum Theory of Atoms and Molecules Breakdown of classical physics: Wave-particle duality Dr Grant Ritchie Electromagnetic waves Remember: The speed of a wave, v, is related to its wavelength, λ,
More informationQuantum physics. Anyone who is not shocked by the quantum theory has not understood it. Niels Bohr, Nobel Price in 1922 ( )
Quantum physics Anyone who is not shocked by the quantum theory has not understood it. Niels Bohr, Nobel Price in 1922 (1885-1962) I can safely say that nobody understand quantum physics Richard Feynman
More informationComplementi di Fisica Lectures 7-9
Complementi di Fisica Lectures 7-9 Livio Lanceri Università di Trieste Trieste, 07/09-10-2012 Course Outline - Reminder Quantum Mechanics: an introduction Waves as particles and particles as waves (the
More informationExercise 1 Atomic line spectra 1/9
Exercise 1 Atomic line spectra 1/9 The energy-level scheme for the hypothetical one-electron element Juliettium is shown in the figure on the left. The potential energy is taken to be zero for an electron
More information