Matter, Light, and their Interactions
|
|
- Alicia Hampton
- 5 years ago
- Views:
Transcription
1 Matter, Light, and their Interactions A Planetary Model of the Atom Almost all astronomical information is obtained through the light we receive from cosmic objects
2 Announcements n Grades for EXAM 1 are now posted on the OWL Gradebook; for clarifications, please see me. n Homework # 3 starts today; it is due on Thursday October 20 th n The schedule for the Final exam is posted on SPIRE (also announced on the course website) n Quiz # 3 will take place on Thursday, October 20 th
3 Assigned Reading n Complete Unit 20 n Units 4, 21, and 22
4 Angular Momentum and Its Conservation
5 Angular Momentum n It is the `quantity of motion of a spinning (rotating) object. L = m. v. r = P. r (units: kg m 2 s -1 ) n Depends on the geometry, the mass, and the rotational velocity of an object. n Angular momentum is conserved. A spinning wheel wants to keep spinning. A stationary wheel wants to keep still. Conservation is the tendency of a spinning object to keep spinning with the rotation axis in a constant direction n Angular momentum is also a vector quantity this means that the direction of the axis of rotation is resistant to change.
6 Everyday Examples of the Conservation of Angular Momentum n Riding a bike n Spinning a basketball on your finger n Steering a satellite n A spinning ice skater
7 Figuring out orbital velocities with angular momentum n The angular momentum of an object (like a planet) moving in a circle (like an orbit!) is: L = m v r = constant v m = mass of planet v = velocity of planet r = orbital radius of planet m r
8 Kepler s Second Law of Orbits 2. As a planet moves around it s orbit, the closer the planet to the Sun, the higher its speed. 1 month
9 How to think about the conservation of angular momentum. The angular momentum before is equal to the angular momentum afterwards. For a planet or satellite: Angular Momentum when close Angular Momentum when distant L 1 = m 1 v 1 r 1 L 2 = m 2 v 2 r 2 but L 1 = L 2 Since m 1 =m 2, v 1 r 1 = v 2 r 2 This is Kepler s Second Law
10 Survey Question L = m v r If Earth orbited the Sun at a distance of ½ AU but with the same angular momentum that it now has, how much faster/slower would its orbital velocity be? 1) ¼ its current value 2) ½ its current value 3) the same as its current value 4) 2 times its current value 5) 4 times its current value
11 Tools of Astronomy - Part 2 q So far we have investigated the tools that enable us to explain the motions of planets (and stars, galaxies, etc.) q Now we need to investigate the tools that enable us to understand how: q stars shine q we measure the size of the Universe q we understand the life cycles of stars q etc., etc., etc.
12 Tools of Astronomy: In other words we need to investigate: 1. Matter 2. Light 3. And how they interact with each other
13 Let s start with Matter n Matter comes in different forms (phases): Solid Liquid Gas Plasma (gas of elementary particles) The particular form we see depends on the temperature and the kind of matter we re looking at. But all matter is made of very simple particles, called atoms.
14 Atoms A Planetary Model of the Atom Atoms are made of: q electrons (swarming around like planets around the sun), q protons, and neutrons (together they form the nucleus, at the center of the atom like the Sun). The bounding force: the attractive Coulomb (electrical) force between the positively charged nucleus and the negatively charged electrons.
15 Atomic View of Matter Electrons have negative charge; protons have positive charge; neutrons have no charge; electrons and protons attract each other
16 Hydrogen Atom Magnified by (nucleus)
17 Energy Levels Electrons can be in different orbits of certain energies, called energy levels. Different atoms have different energy levels, that are called quantized. Quantum means discrete!
18 Excitation of Atoms v Atoms can do what planets cannot do: change energy levels v Electrons can actually absorb energy and move to a more energetic (further away) state v Similar to a satellite changing orbit. v If the energy can remove the electron from the atom, the atom is called ionized. Now you have an ion (net positive charge) v The least energetic state is called ground state. This is a form of light-matter interaction
19 Elements and Isotopes Changing the number of protons in the nucleus changes the element (H, He, Li, etc.) Changing the number of neutrons in the nucleus changes the isotope
20 Survey Question If you could add a proton to an atom to create a new stable, isolated atom, you would have created: 1) an ion 2) an isotope of the original atom 3) a fission reaction 4) a different element
21 Survey Question If you could add a proton to an atom to create a new stable, isolated atom, you would have created: 1) an ion 2) an isotope of the original atom 3) a fission reaction 4) a different element
22 States of Matter Solid molecules are pretty much fixed together Liquid molecules move around a bit more Gas molecules move about freely
23 Atomic View of States of Matter Higher speeds mean higher temperatures
24 Optical Light
25 Light is: n Energy Sometimes called radiant energy Think solar power, photosynthesis, the fireplace n It can travel through empty space! n Information the signal received by your car radio the signals received by telescopes staring at stars the signals received by your eyes right now! n It travel at an incredible speed: c=300,000 km/s!
26 What else is light? n Light is a wave, specifically an electromagnetic wave (remember the `electromagnetic force?); hence: Light= electromagnetic radiation n Light is also a particle, more properly a `bundle of energy called a quantum (a photon) Photons are massless, but they carry energy and react to gravitational fields
27 Light as a wave n Waves you can see: e.g., ocean waves n Waves you cannot see: sound wave electromagnetic waves Light is an electromagnetic wave
28 Properties of Waves n Wavelength the distance between crests (or troughs) of a wave. n Frequency the number of crests (or troughs) that pass by each second. n Speed the rate at which a crest (or trough) moves. For light in general: λ ν = c wavelength speed of light = 3x10 5 km/s in vacuum frequency
29 Visible Light Shorter Wavelength Longer Wavelength
30 n White light is made up of nearly equal amounts of all frequencies in the visible portion of the spectrum.
31 But visible light isn t the whole story. It s just a small part of the entire electromagnetic spectrum Short Wavelength (high frequency) (high energy) Long Wavelength (low frequency) (low energy)
32 Electromagnetic Radiation Short wavelength Long wavelength
33 Infrared versus visible light Infrared Visible
34 Light as particles Light comes in quanta of energy called photons little packets of energy. Photons are massless, but they have momentum and they react to a gravitational field.
35 Intensity More intense = more photons of same frequency More energetic = higher frequency A single photon's energy depends on the wavelength (or frequency) only, not the intensity. But the energy you experience depends also on the intensity (total number of photons). A lot of infrared radiation will make your skin feel warmer than just a little infrared radiation
36 Wave-particle duality All types of electromagnetic radiation act as both waves and particles. "The two views are connected by the relation E=hν = hc / λ h is the Planck's constant = m 2 kg / s More intense = more photons of same frequency More energetic = higher frequency
37 Properties of Light n All light travels through (vacuum) space with a velocity = 3x10 5 km/s n The frequency (or wavelength) of photon determines how much energy the photon has (E=hν). n The number of photons (how many) determines the intensity n You cannot have fractions of photons (i.e., you cannot divide the energy at will) n Light can be described in terms of either energy, frequency, or wavelength.
38 Survey Question: Compared to visible light, radio waves have: n higher energy and longer wavelength n higher energy and shorter wavelength n lower energy and longer wavelength n lower energy and shorter wavelength n all light has the same energy
39 Sun seen in optical and Ultraviolet Optical X-ray
40 Survey Question: When exposed to the Sun for too long, you get sunburned because: The infrared radiation from the Sun is too intense The infrared radiation from the Sun is too energetic The visible radiation from the Sun is too energetic The UV radiation from the Sun is too energetic The UV radiation from the Sun is too intense
41 Survey Question: When exposed to the Sun for too long, you get sunburned because: The infrared radiation from the Sun is too intense The infrared radiation from the Sun is too energetic The visible radiation from the Sun is too energetic The UV radiation from the Sun is too energetic The UV radiation from the Sun is too intense
Reading and Announcements
Reading and Announcements Read Chapters 7.1 and 7.2 Homework #4 due Thursday, February 14 Quiz #3 Tuesday, February 12 No class Tuesday, February 19 as it s a UMass Monday Exam #1, Tuesday, February 21
More informationLecture 6: The Physics of Light, Part 1. Astronomy 111 Wednesday September 13, 2017
Lecture 6: The Physics of Light, Part 1 Astronomy 111 Wednesday September 13, 2017 Reminders Star party tonight! Homework #3 due Monday Exam #1 Monday, September 25 The nature of light Look, but don t
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 informationChapter 5 Light and Matter
Chapter 5 Light and Matter Stars and galaxies are too far for us to send a spacecraft or to visit (in our lifetimes). All we can receive from them is light But there is much we can learn (composition,
More informationChapter 5 Light and Matter: Reading Messages from the Cosmos. What is light? Properties of Waves. Waves. The Electromagnetic Spectrum
Chapter 5 Light and Matter: Reading Messages from the Cosmos What is light? Light is a form of radiant energy Light can act either like a wave or like a particle (photon) Spectrum of the Sun 1 2 Waves
More informationAST 105 Intro Astronomy The Solar System. MIDTERM II: Tuesday, April 5 [covering Lectures 10 through 16]
AST 105 Intro Astronomy The Solar System MIDTERM II: Tuesday, April 5 [covering Lectures 10 through 16] REVIEW Light as Information Bearer We can separate light into its different wavelengths (spectrum).
More informationAtoms and Spectra October 8th, 2013
Atoms and Spectra October 8th, 2013 Announcements Second writing assignment due two weeks from today (again, on a news item of your choice). Be sure to make plans to visit one of the open observing nights
More information10/27/2017 [pgs ]
Objectives SWBAT explain the relationship between energy and frequency. SWBAT predict the behavior of and/or calculate quantum and photon energy from frequency. SWBAT explain how the quantization of energy
More information9/16/08 Tuesday. Chapter 3. Properties of Light. Light the Astronomer s Tool. and sometimes it can be described as a particle!
9/16/08 Tuesday Announce: Observations? Milky Way Center movie Moon s Surface Gravity movie Questions on Gravity from Ch. 2 Ch. 3 Newton Movie Chapter 3 Light and Atoms Copyright (c) The McGraw-Hill Companies,
More informationAstro 1010 Planetary Astronomy Sample Questions for Exam 2
Astro 1010 Planetary Astronomy Sample Questions for Exam 2 Chapter 4 1. The Universal Law of Gravitation says that every particle of matter in the universe attracts every other particle with a force that
More informationHOMEWORK - Chapter 4 Spectroscopy
Astronomy 10 HOMEWORK - Chapter 4 Spectroscopy Use a calculator whenever necessary. For full credit, always show your work and explain how you got your answer in full, complete sentences on a separate
More informationASTRONOMY QUIZ NUMBER 1
ASTRONOMY QUIZ NUMBER. You read in an astronomy atlas that an object has a negative right ascension. You immediately conclude that A) the object is located in the Southern Sky. B) the object is located
More informationPH104 Lab 1 Light and Matter Pre-lab
Name: Lab Time: PH04 Lab Light and Matter Pre-lab. Goals Since this is the first lab, we don t want to try to do things that are too complex. We would like to get used to the lab room and some of the steps
More informationQuick Review. 1. Kinetic Molecular Theory. 2. Average kinetic energy and average velocity. 3. Graham s Law of Effusion. 4. Real Gas Behavior.
Quick Review 1. Kinetic Molecular Theory. 2. Average kinetic energy and average velocity. 3. Graham s Law of Effusion. 4. Real Gas Behavior. Emission spectra Every element has a unique emission spectrum
More informationA100H Exploring the Universe: The interaction of light and matter. Martin D. Weinberg UMass Astronomy
A100H Exploring the Universe: The interaction of light and matter Martin D. Weinberg UMass Astronomy astron100h-mdw@courses.umass.edu February 11, 2016 Read: Chap 5 02/11/16 slide 1 Exam #1: Thu 18 Feb
More informationTides Light the Electromagnetic Spectrum Thermal Radiation. Events. Homework Due Next time (Sept. 22) Exam I on Sept. 24
Events Today Tides Light the Electromagnetic Spectrum Thermal Radiation Homework Due Next time (Sept. 22) Exam I on Sept. 24 Why are stars and planets spherical? Gravity pulls - it is an attractive force
More informationLight and Atoms. ASTR 1120 General Astronomy: Stars & Galaxies. ASTR 1120 General Astronomy: Stars & Galaxies !ATH REVIEW: #AST CLASS: "OMEWORK #1
ASTR 1120 General Astronomy: Stars & Galaxies!ATH REVIEW: Tonight, 5-6pm, in RAMY N1B23 "OMEWORK #1 -Due THU, Sept. 10, by 5pm, on Mastering Astronomy CLASS RECORDED STARTED - INFO WILL BE POSTED on CULEARN
More informationLight & Atoms. Electromagnetic [EM] Waves. Light and several other forms of radiation are called electromagnetic waves or electromagnetic radiation.
Light & Atoms Electromagnetic [EM] Waves Light and several other forms of radiation are called electromagnetic waves or electromagnetic radiation. These have both and electric part and a magnetic part
More informationNOTES: 5.3 Light and Atomic Spectra (more Quantum Mechanics!)
NOTES: 5.3 Light and Atomic Spectra (more Quantum Mechanics!) Light WAVE or PARTICLE? Electromagnetic Radiation Electromagnetic radiation includes: -radio waves -microwaves -infrared waves -visible light
More informationNewton s Law of Gravity. Isaac Newton ( ) Newton s Law of Gravity. Newton s Laws of Motion. Newton s Laws of Motion 2/17/17
Isaac Newton (1642-1727) English physicist and mathematician Studied motion, light, and gravity Newton puts all the pieces together Key idea: Mass Mass is the amount of matter in an object NOT the same
More informationDiscussion Review Test #2. Units 12-19: (1) (2) (3) (4) (5) (6)
Discussion Review Test #2 Units 12-19: (1) (2) (3) (4) (5) (6) (7) (8) (9) Galileo used his observations of the changing phases of Venus to demonstrate that a. the sun moves around the Earth b. the universe
More informationLecture 7. Outline. ASTR 111 Section 002. Discuss Quiz 5 Light. Light travels through empty space at a speed of 300,000 km/s
Lecture 7 ASTR 111 Section 002 Outline Discuss Quiz 5 Light Suggested reading: Chapter 5.1-5.2 and 5.6-5.8 of textbook Light travels through empty space at a speed of 300,000 km/s In 1676, Danish astronomer
More informationChapter 5 Light and Matter: Reading Messages from the Cosmos. How do we experience light? Colors of Light. How do light and matter interact?
Chapter 5 Light and Matter: Reading Messages from the Cosmos How do we experience light? The warmth of sunlight tells us that light is a form of energy We can measure the amount of energy emitted by a
More informationWhat is LIGHT? Reading Question
Reading Question What is LIGHT? A. Light is a wave, like sound only much faster. B. Light is like little particles. Each one is a photon. C. Light is the absence of dark. D. A kind of energy we model with
More informationAST 102 chapter 5. Radiation and Spectra. Radiation and Spectra. Radiation and Spectra. What is light? What is radiation?
5 Radiation and Spectra 1 Radiation and Spectra What is light? According to Webster: a.something that makes vision possible b.the sensation aroused by stimulation of the visual receptors c.electromagnetic
More informationThe Electron Cloud. Here is what we know about the electron cloud:
The Electron Cloud Here is what we know about the electron cloud: It contains the subatomic particles called electrons This area accounts for most of the volume of the atom ( empty space) These electrons
More informationASTR : Stars & Galaxies (Spring 2019)... Study Guide for Midterm 1
ASTR-1200-01: Stars & Galaxies (Spring 2019)........................ Study Guide for Midterm 1 The first midterm exam for ASTR-1200 takes place in class on Wednesday, February 13, 2019. The exam covers
More informationAtoms, Electrons and Light MS. MOORE CHEMISTRY
Atoms, Electrons and Light MS. MOORE CHEMISTRY Atoms Remember Rutherford??? What did he discover with his gold foil experiment. A: Atoms contain a dense nucleus where the protons and neutrons reside. ATOMS
More informationThe atom cont. +Investigating EM radiation
The atom cont. +Investigating EM radiation Announcements: First midterm is 7:30pm on Sept 26, 2013 Will post a past midterm exam from 2011 today. We are covering Chapter 3 today. (Started on Wednesday)
More informationI understand the relationship between energy and a quanta I understand the difference between an electron s ground state and an electron s excited
NCCS 1.1.2 & 1.1.3 I understand the relationship between energy and a quanta I understand the difference between an electron s ground state and an electron s excited state I will describe how an electron
More informationPlanetary Science: Investigations 9-10 I-Check Quiz STUDY GUIDE Name HR Date
1. How are different types of radiation arranged along the electromagnetic spectrum? A. By how fast they travel incorrect answer B. By their sources incorrect answer C. By the amount of energy they carry
More informationChapter 5. Electrons in Atoms
Chapter 5 Electrons in Atoms Warm - Up What kind of light causes you to sunburn? Why does only this type of light burn your skin and not other light? What does sunscreen do on a chemical level? Today s
More informationChapter 7 QUANTUM THEORY & ATOMIC STRUCTURE Brooks/Cole - Thomson
Chapter 7 QUANTUM THEORY & ATOMIC STRUCTURE 1 7.1 The Nature of Light 2 Most subatomic particles behave as PARTICLES and obey the physics of waves. Light is a type of electromagnetic radiation Light consists
More informationWELCOME TO PERIOD 20: RADIANT ENERGY FROM THE SUN
WELCOME TO PERIOD 20: RADIANT ENERGY FROM THE SUN Homework #19 is due today. Midterm 2: Weds, Mar 27, 7:45 8:55 pm (Same room as your midterm 1 exam.) Covers periods 10 19 and videos 3 & 4 Review: Tues,
More informationLecture5PracticeQuiz.txt
TAKEN FROM HORIZONS 7TH EDITION CHAPTER 6 TUTORIAL QUIZ 1. The difference between radiation and sound is that a. radiation exhibits the Doppler effect, whereas sound does not. b. radiation travels much
More informationChapter 5. Electrons in Atoms
Chapter 5 Electrons in Atoms Warm - Up What kind of light causes you to sunburn? Is that the only light that the sun emits? What does sunscreen do on a chemical level? Today s Agenda Question of the day:
More informationAnnouncements. Atom Energy Levels
Astronomy 101, Oct. 16, 2008 Announcements OWL Homework #3 now available. Due Sunday, 10/19, before midnight. No class next Tuesday. Final exam has been scheduled by the registrar. Date, time, and place:
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 informationAstronomy 150 K. Nordsieck Spring Exam 1 Solutions. 1. ( T F ) In Madison the North Star, Polaris, is situated almost exactly at the zenith.
Astronomy 150 K. Nordsieck Spring 2000 Exam 1 Solutions True or False (Circle T or F) 1. ( T F ) In Madison the North Star, Polaris, is situated almost exactly at the zenith. False. Polaris is near the
More informationTable of Contents Electrons in Atoms > Light and Quantized Energy > Quantum Theory and the Atom > Electron Configuration
Electrons in Atoms October 20, 2014 Table of Contents Electrons in Atoms > Light and Quantized Energy > Quantum Theory and the Atom > Electron Configuration 1 Electromagnetic Spectrum Electromagnetic radiation
More information= λ. Light: The Cosmic Messenger. Continuing Topics for Today 1/24/17. Your account on Mastering Astronomy. ASTR 1040 Stars & Galaxies
REMINDER Your account on Mastering Astronomy ASTR 1040 Stars & Galaxies SDO: Post-flare ejection from solar surface Prof. Juri Toomre TAs: Piyush Agrawal, Connor Bice Lecture 3 Tues 24 Jan 2017 zeus.colorado.edu/astr1040-toomre
More informationElectromagnetic radiation simply a stream of photons (a bundle of energy) What are photons???
Electromagnetic radiation simply a stream of photons (a bundle of energy) What are photons??? no mass travel in a wave like pattern move at the speed of light contain a certain amount (or bundle) of energy
More informationName Final Exam December 7, 2015
Name Final Exam December 7, 015 This test consists of five parts. Please note that in parts II through V, you can skip one question of those offered. Part I: Multiple Choice (mixed new and review questions)
More informationPlanetary Science: Investigations 9-10 I-Check Quiz STUDY GUIDE- ANSWER KEY Name HR Date
1. How are different types of radiation arranged along the electromagnetic spectrum? A. By how fast they travel incorrect answer B. By their sources incorrect answer C. By the amount of energy they carry
More informationPotentially useful formulas: F = G m 1m 2 r 2 F = k q 1q 2 F = ma Distance = Speed Time
PHY100 May 4, 2010 Final Exam Name: Aran Garcia-Bellido Please read the problems carefully and answer them in the space provided. Write on the back of the page, if necessary. Show your work where requested
More informationAstronomy 1143 Quiz 2 Review
Astronomy 1143 Quiz 2 Review Prof. Pradhan October 1, 2018 Light 1. What is light? Light is electromagnetic energy It is both a particle (photon) and a wave 2. How is light created and what can light interact
More informationATM S 111: Global Warming Solar Radiation. Jennifer Fletcher Day 2: June
ATM S 111: Global Warming Solar Radiation Jennifer Fletcher Day 2: June 22 2010 Yesterday We Asked What factors influence climate at a given place? Sunshine (and latitude) Topography/mountains Proximity
More informationIntroduction. Electromagnetic Waves. Electromagnetic Waves
Introduction Much of the information we know about electrons comes from studies of interactions of light and matter. In the early 1900 s, scientists discovered that light has properties of both a wave
More informationFinal exam is Wednesday, December 14, in LR 1 VAN at 9:45 am.
Announcements Final exam is Wednesday, December 14, in LR 1 VAN at 9:45 am. Astronomy tutorial: Tuesday 3-5, 7-9 pm in 310 VAN Office hours: Tuesday 1 3 pm, Wednesday 10-11 am, or by appointment in 702
More informationWhat is it? What are the different types?
What is it? What are the different types? Energy definition Energy is a challenging concept to understand and explain Energy is an abstract concept that has slightly different definitions depending on
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 informationAstronomy 1504/15014 Section 20
1 point each Astronomy 1504/15014 Section 20 Midterm 1 (Practice Exam) September 21, 2015 Exam Version A Choose the answer that best completes the question. Read each problem carefully and read through
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 informationThe Basics of Light. Sunrise from the Space Shuttle, STS-47 mission. The Basics of Light
The Basics of Light The sun as it appears in X-ray light (left) and extreme ultraviolet light (right). Light as energy Light is remarkable. It is something we take for granted every day, but it's not something
More informationChapter 6. Quantum Theory and the Electronic Structure of Atoms Part 1
Chapter 6 Quantum Theory and the Electronic Structure of Atoms Part 1 The nature of light Quantum theory Topics Bohr s theory of the hydrogen atom Wave properties of matter Quantum mechanics Quantum numbers
More informationPrentice Hall. Physics: Principles with Applications, Updated 6th Edition (Giancoli) High School
Prentice Hall Physics: Principles with Applications, Updated 6th Edition (Giancoli) 2009 High School C O R R E L A T E D T O Physics I Students should understand that scientific knowledge is gained from
More informationAstronomy 101 Test 1 Review FOUNDATIONS
Astronomy 101 Test 1 Review FOUNDATIONS Scientists use the metric system to measure things. It is based on powers ten, and is thus more logical than our everyday Imperial system. The kilogram (or gram),
More informationPhotochemical principles
Chapter 1 Photochemical principles Dr. Suzan A. Khayyat 1 Photochemistry Photochemistry is concerned with the absorption, excitation and emission of photons by atoms, atomic ions, molecules, molecular
More informationc = l Light: The Cosmic Messenger 1/23/18
Reading for today s and Thur class: ASTR 1040 Stars & Galaxies SDO: Post-flare ejection from solar surface Prof. Juri Toomre TAs: Peri Johnson, Ryan Horton Lecture 3 Tues 23 Jan 2018 zeus.colorado.edu/astr1040-toomre
More informationThe Atom and its components The 4 phases of matter The electromagnetic field Light traveling electromagnetic waves, quantized as photons Accelerate
Astro 7: Chapter 5 Matter & Light The Atom and its components The 4 phases of matter The electromagnetic field Light traveling electromagnetic waves, quantized as photons Accelerate an electric charge,
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 informationAdvanced Higher Physics
Wallace Hall Academy Physics Department Advanced Higher Physics Quanta Problems AH Physics: Quanta 1 2015 Data Common Physical Quantities QUANTITY SYMBOL VALUE Gravitational acceleration g 9.8 m s -2 Radius
More informationHonors Ch3 and Ch4. Atomic History and the Atom
Honors Ch3 and Ch4 Atomic History and the Atom Ch. 3.1 The Atom is Defined 400 B.C. the Greek philosopher Democritus said that the world was made of two things: Empty space and tiny particles called atoms
More informationFrom Last Time. Summary of Photoelectric effect. Photon properties of light
Exam 3 is Tuesday Nov. 25 5:30-7 pm, 203 Ch (here) Students w / scheduled academic conflict please stay after class Tues. Nov. 8 (TODAY) to arrange alternate time. From Last Time Photoelectric effect and
More information1/20/17. Topics for Today and Tues. Reading for today s and Tues class: ASTR 1040: Stars & Galaxies. Your account on Mastering Astronomy
REMINDER Reading for today s and Tues class: ASTR 1040: Stars & Galaxies How to Succeed in this course, p. xxiv+ Chapter 1, all (Our Place in Universe) Review Basic Astronomical terms, p. 6 Chap 3, sec
More informationCosmic Evolution, Part II. Heavy Elements to Molecules
Cosmic Evolution, Part II Heavy Elements to Molecules Heavy elements molecules First a review of terminology: Electromagnetic Electrons Element Atom Nucleus Compound Molecule Electromagnetic Strong Nuclear
More informationASTRONOMY LECTURE NOTES MIDTERM REVIEW. ASTRONOMY LECTURE NOTES Chapter 1 Charting the Heavens
ASTRONOMY LECTURE NOTES MIDTERM REVIEW ASTRONOMY LECTURE NOTES Chapter 1 Charting the Heavens How Do We Locate Objects in the Sky? Local-Sky Coordinates versus Celestial-Sphere Coordinates When the sky
More informationASTRONOMY. Chapter 5 RADIATION AND SPECTRA PowerPoint Image Slideshow
ASTRONOMY Chapter 5 RADIATION AND SPECTRA PowerPoint Image Slideshow FIGURE 5.1 Our Sun in Ultraviolet Light. This photograph of the Sun was taken at several different wavelengths of ultraviolet, which
More informationCRHS Academic Chemistry Unit 4 Electrons. Notes. Key Dates
Name Period CRHS Academic Chemistry Unit 4 Electrons Notes Key Dates Quiz Date Exam Date Lab Dates Notes, Homework, Exam Reviews and Their KEYS located on CRHS Academic Chemistry Website: https://cincochem.pbworks.com
More informationLight carries energy. Lecture 5 Understand Light. Is light. Light as a Particle. ANSWER: Both.
Light carries energy Lecture 5 Understand Light Reading: Chapter 6 You feel energy carried by light when light hits your skin. Energy Conservation: Radiation energy will be given to molecules making your
More informationCosmic Evolution, Part II. Heavy Elements to Molecules
Cosmic Evolution, Part II Heavy Elements to Molecules First a review of terminology: Element Atom Electro- magnetic Electrons Nucleus Electromagnetic Strong Nuclear Compound Molecule Protons Neutrons Neutral
More information1. Which of the following correctly lists our cosmic address from small to large?
1. Which of the following correctly lists our cosmic address from small to large? (a) Earth, solar system, Milky Way Galaxy, Local Group, Local Super Cluster, universe (b) Earth, solar system, Milky Way
More informationChapter 5 Light and Matter: Reading Messages from the Cosmos. 5.1 Light in Everyday Life. How do we experience light?
Chapter 5 Light and Matter: Reading Messages from the Cosmos 5.1 Light in Everyday Life Our goals for learning: How do we experience light? How do light and matter interact? How do we experience light?
More informationCalendar. October 23, Chapter 5 Notes Waves.notebook Waves vocab waves ws. quiz PSAT. Blank. elements test. demo day
Calendar Sunday Monday Tuesday Wednesday Thursday Friday Saturday 13 14 Waves vocab waves ws 20 PSAT make notecards 7th 15 21 22 quiz 16 23 17 24 27 28 29 30 31 elements test demo day Blank 1 The Nature
More informationLight and Matter: Reading Messages from the Cosmos. White light is made up of many different colors. Interactions of Light with Matter
Chapter 5 Lecture The Cosmic Perspective Light and Matter: Reading Messages from the Cosmos 5.1 Light in Everyday Life Our goals for learning: How do we experience light? How do light and matter interact?
More information2) The energy of a photon of light is proportional to its frequency and proportional to its wavelength.
Advanced Chemistry Chapter 13 Review Name Per Show all work Wave Properties 1) Which one of the following is correct? A) ν + λ = c B) ν λ = c C) ν = cλ D) λ = c ν E) νλ = c 2) The energy of a photon of
More information1, 2, 3, 4, 6, 14, 17 PS1.B
Correlations to Next Generation Science Standards Physical Science Disciplinary Core Ideas PS-1 Matter and Its Interactions PS1.A Structure and Properties of Matter Each atom has a charged substructure
More informationAnswer Key for Exam C
Answer Key for Exam C 2 points each Choose the answer that best completes the question. Read each problem carefully and read through all the answers. Take your time. If a question is unclear, ask for clarification
More informationAnswer Key for Exam B
Answer Key for Exam B 2 points each Choose the answer that best completes the question. Read each problem carefully and read through all the answers. Take your time. If a question is unclear, ask for clarification
More informationTaking fingerprints of stars, galaxies, and interstellar gas clouds
- - Taking fingerprints of stars, galaxies, and interstellar gas clouds Absorption and emission from atoms, ions, and molecules Periodic Table of Elements The universe is mostly hydrogen H and helium He
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 informationaka Light Properties of Light are simultaneously
Today Interaction of Light with Matter Thermal Radiation Kirchhoff s Laws aka Light Properties of Light are simultaneously wave-like AND particle-like Sometimes it behaves like ripples on a pond (waves).
More informationAnswer Key for Exam D
Answer Key for Exam D 2 points each Choose the answer that best completes the question. Read each problem carefully and read through all the answers. Take your time. If a question is unclear, ask for clarification
More informationCh 9 Electrons in Atoms & the Periodic Table Study Sheet Acc. Chemistry SCANTRON. Name /99. 3) Light is a type of matter. 3)
Ch 9 Electrons in Atoms & the Periodic Table Study Sheet Acc. Chemistry SCANTRON Name /99 TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) When the elements are arranged
More informationChapter 4 Arrangement of Electrons in Atoms. 4.1 The Development of a New Atomic Model
Chapter 4 Arrangement of Electrons in Atoms 4.1 The Development of a New Atomic Model Properties of Light Electromagnetic Radiation: EM radiation are forms of energy which move through space as waves There
More information2) The number of cycles that pass through a stationary point is called A) wavelength. B) amplitude. C) frequency. D) area. E) median.
Chemistry Structure and Properties 2nd Edition Tro Test Bank Full Download: http://testbanklive.com/download/chemistry-structure-and-properties-2nd-edition-tro-test-bank/ Chemistry: Structure & Properties,
More information298 Chapter 6 Electronic Structure and Periodic Properties of Elements
98 Chapter 6 Electronic Structure and Periodic Properties of Elements 6. The Bohr Model By the end of this section, you will be able to: Describe the Bohr model of the hydrogen atom Use the Rydberg equation
More informationChapter 5 Light: The Cosmic Messenger. Copyright 2012 Pearson Education, Inc.
Chapter 5 Light: The Cosmic Messenger 5.1 Basic Properties of Light and Matter Our goals for learning: What is light? What is matter? How do light and matter interact? What is light? Light is an electromagnetic
More informationWave Description. Transverse and Longitudinal Waves. Physics Department 2/13/2019. Phys1411 Goderya 1. PHYS 1403 Stars and Galaxies
PHYS 1403 Stars and Galaxies for Today s Class 1. How do we explain the motion of energy? 2. What is a wave and what are its properties 3. What is an electromagnetic spectrum? 4. What is a black body and
More informationChapter 4 Electron Configurations
Chapter 4 Electron Configurations Waves Today scientists recognize light has properties of waves and particles Waves: light is electromagnetic radiation and travels in electromagnetic waves. 4 Characteristics
More informationProperties of Light and Atomic Structure. Chapter 7. So Where are the Electrons? Electronic Structure of Atoms. The Wave Nature of Light!
Properties of Light and Atomic Structure Chapter 7 So Where are the Electrons? We know where the protons and neutrons are Nuclear structure of atoms (Chapter 2) The interaction of light and matter helps
More informationLecture: October 1, 2010
Lecture: October 1, 2010 How long would it take to walk to Alpha Centauri? Announcements: Next Observatory Opportunity: Wednesday October 6 Phases of Matter the phases solid liquid gas plasma depend on
More information9/19/ Basic Properties of Light and Matter. Chapter 5: Light: The Cosmic Messenger. What is light? Lecture Outline
Lecture Outline 5.1 Basic Properties of Light and Matter Chapter 5: Light: The Cosmic Messenger Our goals for learning: What is light? What is matter? How do light and matter interact? What is light? Light
More information10/29/2018. Chapter 7. Atoms Light and Spectra. Reminders. Topics For Today s Class. Hydrogen Atom. The Atom. Phys1411 Introductory Astronomy
Phys1411 Introductory Astronomy Instructor: Dr. Goderya Chapter 7 Atoms Light and Spectra Reminders Topics For Today s Class Project 1 due November 12 th after and during Lab. Extra-credit Homework online.
More informationPhysics 222, Modern Physics, Exam 1 NAME
Physics 222, Modern Physics, Exam 1 NAME You are graded on your work, with partial credit where it is deserved. Please be clear and well-organized in all your steps. 1. Gold has a work function of 4.83
More informationAstronomy 104: Second Exam
Astronomy 104: Second Exam Stephen Lepp October 29, 2014 Each question is worth 2 points. Write your name on this exam and on the scantron. Short Answer A The Sun is powered by converting hydrogen to what?
More informationName Period. Practice Problems
Name Period CRHS Academic Chemistry Unit 4 Electrons Practice Problems Due Date Assignment On-Time (100) Late (70) 4.1 4.2 4.3 4.4 4.5 Warm-Up EC Notes, Homework, Exam Reviews and Their KEYS located on
More informationTelescopes (Chapter 6)
Telescopes (Chapter 6) Based on Chapter 6 This material will be useful for understanding Chapters 7 and 10 on Our planetary system and Jovian planet systems Chapter 5 on Light will be useful for understanding
More informationChapter 7. Atomic Structure
Chapter 7 Atomic Structure Light Made up of electromagnetic radiation. Waves of electric and magnetic fields at right angles to each other. Parts of a wave Wavelength Frequency = number of cycles in one
More informationCHAPTER 28 STARS AND GALAXIES
CHAPTER 28 STARS AND GALAXIES 28.1 A CLOSER LOOK AT LIGHT Light is a form of electromagnetic radiation, which is energy that travels in waves. Waves of energy travel at 300,000 km/sec (speed of light Ex:
More information