# Discussion Review Test #2. Units 12-19: (1) (2) (3) (4) (5) (6)

Size: px
Start display at page:

Download "Discussion Review Test #2. Units 12-19: (1) (2) (3) (4) (5) (6)"

Transcription

1 Discussion Review Test #2 Units 12-19: (1) (2) (3) (4) (5) (6)

2 (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 is infinite in size c. the Earth is a sphere d. the Moon orbits the Earth e. Venus follows an orbit around the Sun (10) (11) (12)

3 (13) (14) (15) (16) (17) (18)

4 (19) (20) If an object moves along a curved path at a constant speed, you can infer that a. a force is acting on on it b. it is accelerating c. it is in uniform motion d. Both (a) and (b) e. Neither (a) nor (b) (21) The mass of a 5 kg bowling ball would be if it were located in deep space a. zero b. much smaller c. slightly smaller d. the same (22) Gravity a. is the result of the pressure of the atmosphere on us b. occurs between objects that are touching c. is the force larger objects exert on smaller ones d. is the attraction between all objects that have mass e. is caused only by the planets and the Sun (23) The Moon s escape velocity is smaller than the Earth s because a. its radius is smaller b. its mass is smaller c. its distance from the Earth is greater d. it has no atmosphere e. All of the above Units (24)

5 (25) A volleyball has about half the mass of a basketball. If they are both moving at the same speed, the volleyball s kinetic energy would be the basketball s. a. 2 times more than b. ½ as much as c. 4 times more than d. ¼ as much as e. the same as (26) Why do stars at greater distances appear less bright? (assume the same total light output) a. photons lose energy as they travel b. photons spread out as they travel c. interference from the wave nature of light d. all of the above (27) Consider two stars with the same luminosity. Star A is twice the distance from Earth as star B. How does their brightness compare? a. B is 2 times as bright b. A is 2 times as bright c. B is 4 times as bright d. B is 16 times as bright e. They are the same brightness (28) Which type of electromagnetic radiation has the longest wavelength? a. Visible b. Ultraviolet c. X-ray d. Infrared e. Radio (29) Which kind of photon has the highest energy? a. Ultraviolet b. Visible c. X-ray d. Infrared e. Radio (30) Describing an atom s orbitals as being quantized refers to the fact that a. the atom is made of individual electrons, protons, and neutrons. b. Orbits resemble a planet in orbit about the sun c. Only some orbits are allowed corresponding to allowed energies. d. The electron s electric change has a fixed value

6 (31) Star A s spectrum peaks at a bluer wavelength than Star B s spectrum a. A is hotter than B b. B is hotter than A c. Star are not blackbodies, therefore we cannot tell. (32) Imagine you are observing a star with a molecular cloud between the Earth and star. What type of spectrum do you expect to observe? a. emission b. absorption c. continuous (33) If the sun s temperature is doubled what would its expected luminosity be? a. 2 times more b. 4 times more c. 2 times less d. 16 time more (34) Most stars have spectra showing dark lines against a continuous background of color. This observation indicates that these stars a. are made almost entirely of hot, low-density gas b. are made almost entirely of cool, low density gas c. have a warm interior that shines through hotter, high-density gas d. have a hot interior that shines through cooler, low-density gas (35) If an object s spectral lines are shifted to longer wavelengths, the object is a. moving away from us b. moving toward us c. very hot d. very cold e. emitting x-rays (36) Which of the following is NOT a reason that astronomers seek to build larger telescopes? a. Larger telescopes can resolve greater detail b. Larger telescopes collect more photons c. Larger telescopes can detect fainter objects d. Larger telescopes are less affected by the Earth s atmosphere (37) Which of the following is an important difference between radio waves and other electromagnetic radiation for the design of astronomical instrumentation? a. Radio waves are detected as sounds, not light b. Radio wavelengths travel much more slowly than other electromagnetic radiation c. Radio photons have very small energies d. Radio waves cannot be focused e. All of the above

7 (38) A telescope s resolution measures its ability to see a. fainter sources b. more distant sources c. finer details in sources d. larger sources e. more rapidly moving sources (39) Why are mirrors on optical telescopes parabolic? a. spherical mirrors are harder to make b. parabolic mirrors focus parallel beams of light c. parabolic mirrors filter out atmospheric effects (40) When designing a telescope which would be the most important consideration a. amount of magnification b. diameter to telescope c. both are equally important (41) What makes x-ray telescopes unique? a. x-rays are not electromagnetic radiation b. x-rays have higher energy than visible light c. x-rays pass through normal mirrors d. all of the above e. b & c (42) What is dispersion? a. described by the wave nature of light; passing through a small opening a plane wave will emerge circular. b. effect caused by different wavelengths of light traveling at slightly different speeds in most materials c. describes the ability of transparent substances to alter the path of electromagnetic waves (43) What is refraction? a. described by the wave nature of light; passing through a small opening a plane wave will emerge circular. b. effect caused by different wavelengths of light traveling at slightly different speeds in most materials c. describes the ability of transparent substances to alter the path of electromagnetic waves

8 (44) What is diffraction? a. described by the wave nature of light; passing through a small opening a plane wave will emerge circular. b. effect caused by different wavelengths of light traveling at slightly different speeds in most materials c. describes the ability of transparent substances to alter the path of electromagnetic waves

### aka 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).

### Properties of Electromagnetic Radiation Chapter 5. What is light? What is a wave? Radiation carries information

Concepts: Properties of Electromagnetic Radiation Chapter 5 Electromagnetic waves Types of spectra Temperature Blackbody radiation Dual nature of radiation Atomic structure Interaction of light and matter

### LIGHT. Question. Until very recently, the study of ALL astronomical objects, outside of the Solar System, has been with telescopes observing light.

LIGHT Question Until very recently, the study of ALL astronomical objects, outside of the Solar System, has been with telescopes observing light. What kind of information can we get from light? 1 Light

### Today. Spectra. Thermal Radiation. Wien s Law. Stefan-Boltzmann Law. Kirchoff s Laws. Emission and Absorption. Spectra & Composition

Today Spectra Thermal Radiation Wien s Law Stefan-Boltzmann Law Kirchoff s Laws Emission and Absorption Spectra & Composition Spectrum Originally, the range of colors obtained by passing sunlight through

### Light 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

### HOMEWORK - 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

### Review: 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.

### λ is a distance, so its units are m, cm, or mm, etc.

Electromagnetic Radiation (How we get most of our information about the cosmos) Radiation travels as waves. Waves carry information and energy. Properties of a wave Examples of electromagnetic radiation:

### The Nature of Light I: Electromagnetic Waves Spectra Kirchoff s Laws Temperature Blackbody radiation

The Nature of Light I: Electromagnetic Waves Spectra Kirchoff s Laws Temperature Blackbody radiation Electromagnetic Radiation (How we get most of our information about the cosmos) Examples of electromagnetic

### Lecture 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

### Recall: The Importance of Light

Key Concepts: Lecture 19: Light Light: wave-like behavior Light: particle-like behavior Light: Interaction with matter - Kirchoff s Laws The Wave Nature of Electro-Magnetic Radiation Visible light is just

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

### Prof. Jeff Kenney Class 5 June 1, 2018

www.astro.yale.edu/astro120 Prof. Jeff Kenney Class 5 June 1, 2018 to understand how we know stuff about the universe we need to understand: 1. the spectral analysis of light 2. how light interacts with

### Chapter 5 Light and Matter: Reading Messages from the Cosmos

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?

### X Rays must be viewed from space used for detecting exotic objects such as neutron stars and black holes also observing the Sun.

6/25 How do we get information from the telescope? 1. Galileo drew pictures. 2. With the invention of photography, we began taking pictures of the view in the telescope. With telescopes that would rotate

### PHYS 160 Astronomy Test #2 Fall 2017 Version A

PHYS 160 Astronomy Test #2 Fall 2017 Version A I. True/False (1 point each) Circle the T if the statement is true, or F if the statement is false on your answer sheet. 1. A blackbody emits all of its radiation

### AST 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).

### What 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

### ASTR-1010: Astronomy I Course Notes Section IV

ASTR-1010: Astronomy I Course Notes Section IV Dr. Donald G. Luttermoser Department of Physics and Astronomy East Tennessee State University Edition 2.0 Abstract These class notes are designed for use

### Atoms 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

### Astronomy 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),

### Astronomy 1 Fall 2016

Astronomy 1 Fall 2016 One person s perspective: Three great events stand at the threshold of the modern age and determine its character: 1) the discovery of America; 2) the Reformation; 3) the invention

### Assignments. For Wed. 1 st Midterm is Friday, Oct. 12. Do Online Exercise 08 ( Doppler shift tutorial)

Assignments For Wed. Do Online Exercise 08 ( Doppler shift tutorial) 1 st Midterm is Friday, Oct. 12 Chapter 5 Light: The Cosmic Messenger Which forms of light are lower in energy and frequency than the

### 9/16/08 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,

### Astronomy 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

### Semester 1 Final Exam Review

Semester 1 Final Exam Review Concept Check To see the greatest number of stars possible throughout the period of one year, a person should be located at latitude a) 90 degrees. b) 45 degrees. c) 0 degrees.

### Phys 100 Astronomy (Dr. Ilias Fernini) Review Questions for Chapter 5

Phys 100 Astronomy (Dr. Ilias Fernini) Review Questions for Chapter 5 MULTIPLE CHOICE 1. What is the wavelength of the longest wavelength light visible to the human eye? a. 400 nm b. 4000 nm c. 7000 nm

### Lecture #8. Light-matter interaction. Kirchoff s laws

1 Lecture #8 Light-matter interaction Kirchoff s laws 2 Line emission/absorption Atoms: release and absorb photons with a predefined set of energies (discrete). The number of protons determine the chemical

### Light. October 14, ) Exam Review 2) Introduction 3) Light Waves 4) Atoms 5) Light Sources

Light October 14, 2002 1) Exam Review 2) Introduction 3) Light Waves 4) Atoms 5) Light Sources Waves You know of many types of waves water, sound, seismic, etc A wave is something oscillating back and

### Chapter 23. Light, Astronomical Observations, and the Sun

Chapter 23 Light, Astronomical Observations, and the Sun The study of light Electromagnetic radiation Visible light is only one small part of an array of energy Electromagnetic radiation includes Gamma

### 1) What do all waves transport from one place to another?

Pre Quiz 1) What do all waves transport from one place to another? 2) In which of the following scenarios would the Doppler effect be present? a) A police car, with its siren sounding, speeds past you

### Lecture5PracticeQuiz.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

### Chapter 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?

### Light and Matter(LC)

Light and Matter(LC) Every astronomy book that I ve seen has at least one chapter dedicated to the physics of light. Why are astronomers so interested in light? Everything* that we know about Astronomical

Electromagnetic Radiation aka Light Properties of Light are simultaneously wave-like AND particle-like Sometimes it behaves like ripples on a pond (waves). Sometimes it behaves like billiard balls (particles).

### Susan Cartwright Our Evolving Universe 1

Atoms and Starlight Why do the stars shine? planets shine by reflected sunlight but what generates the Sun s light? What does starlight tell us about the stars? their temperature their chemical composition

### LIFE CYCLE OF A STAR

LIFE CYCLE OF A STAR First stage = Protostar PROTOSTAR Cloud of gas and dust many light-years across Gravity tries to pull the materials together Eventually, at the center of the ball of dust and gas,

### ASTRONOMY 161. Introduction to Solar System Astronomy. Class 9

ASTRONOMY 161 Introduction to Solar System Astronomy Class 9 Light Monday, January 29 Look, but don t touch. - Astronomers Motto Light: Key Concepts (1) Visible light is just one form of electromagnetic

### Taking 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

### Chapter 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

Observing the Universe: Telescopes Astronomy 2020 Lecture 6 Prof. Tom Megeath Today s Lecture: 1. A little more on blackbodies 2. Light, vision, and basic optics 3. Telescopes Properties of Thermal Radiation

### Useful Formulas and Values

Name Test 1 Planetary and Stellar Astronomy 2017 (Last, First) The exam has 20 multiple choice questions (3 points each) and 8 short answer questions (5 points each). This is a closed-book, closed-notes

### Next quiz: Monday, October 24 Chp. 6 (nothing on telescopes) Chp. 7 a few problems from previous material cough, cough, gravity, cough, cough...

Next quiz: Monday, October 24 Chp. 6 (nothing on telescopes) Chp. 7 a few problems from previous material cough, cough, gravity, cough, cough... 1 Chapter 7 Atoms and Starlight Kirchhoff s Laws of Radiation

### Newton s Laws of Motion

Newton s Laws of Motion #1: A body continues at rest or in uniform motion in a straight line unless acted upon by a force. Why doesn t the soccer ball move on its own? What causes a soccer ball to roll

Base your answers to questions 1 and 2 on the passage below and on your knowledge of Earth Science. Cosmic Microwave Background Radiation In the 1920s, Edwin Hubble's discovery of a pattern in the red

### Types of Spectra. How do spectrum lines form? 3/30/09. Electron cloud. Atom. Nucleus

The electron should be thought of as a distribution or cloud of probability around the nucleus that on average behave like a point particle on a fixed circular path Types of Spectra How do spectrum lines

### Chapter 5: Light and Matter: Reading Messages from the Cosmos

Chapter 5 Lecture Chapter 5: Light and Matter: Reading Messages from the Cosmos Light and Matter: Reading Messages from the Cosmos 5.1 Light in Everyday Life Our goals for learning: How do we experience

### The Universe. 3. Base your answer to the following question on The diagram below represents the bright-line spectrum for an element.

A) B) The Universe 1. According to the Big Bang theory, which graph hest represents the relationship between time and the size of the universe from the beginning of the universe to the present? C) D) 2.

### AST 101 INTRODUCTION TO ASTRONOMY SPRING MIDTERM EXAM 1 TEST VERSION 1 ANSWERS NOTE: Question 20 Fixed

AST 101 INTRODUCTION TO ASTRONOMY SPRING 2008 - MIDTERM EXAM 1 TEST VERSION 1 ANSWERS NOTE: Question 20 Fixed Multiple Choice. In the blanks provided before each question write the letter for the phrase

### In class quiz - nature of light. Moonbow with Sailboats (Matt BenDaniel)

In class quiz - nature of light Moonbow with Sailboats (Matt BenDaniel) Nature of light - review Light travels at very high but finite speed. Light is electromagnetic wave characterized by wavelength (or

### F = ma P 2 = a 3 (M + m) P 2 = a 3. max T = 2900 K m

Summer 2013 Astronomy - Test 1 Test form A Name Do not forget to write your name and fill in the bubbles with your student number, and fill in test form A on the answer sheet. Write your name above as

### Astronomy. Optics and Telescopes

Astronomy A. Dayle Hancock adhancock@wm.edu Small 239 Office hours: MTWR 10-11am Optics and Telescopes - Refraction, lenses and refracting telescopes - Mirrors and reflecting telescopes - Diffraction limit,

### Taking fingerprints of stars, galaxies, and interstellar gas clouds. Absorption and emission from atoms, ions, and molecules

Taking fingerprints of stars, galaxies, and interstellar gas clouds Absorption and emission from atoms, ions, and molecules 1 Periodic Table of Elements The universe is mostly hydrogen H and helium He

### Tides 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

### The Nature of Light. We have a dual model

Light and Atoms Properties of Light We can come to understand the composition of distant bodies by analyzing the light they emit This analysis can tell us about the composition as well as the temperature

### a. 1/3 AU b. 3 AU 5. Meteor showers occur

1 AST104 Sp. 2006: WELCOME TO EXAM 3 Multiple Choice Questions: Mark the best answer choice on the answer form. Read all answer choices before making selection. CHECK YOUR WORK CAREFULLY BEFORE HANDING

### Telescopes (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

### Light 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?

### Taking Fingerprints of Stars, Galaxies, and Other Stuff. The Bohr Atom. The Bohr Atom Model of Hydrogen atom. Bohr Atom. Bohr Atom

Periodic Table of Elements Taking Fingerprints of Stars, Galaxies, and Other Stuff Absorption and Emission from Atoms, Ions, and Molecules Universe is mostly (97%) Hydrogen and Helium (H and He) The ONLY

### (in case you missed it yesterday ) Merger of Two Neutron Stars!

(in case you missed it yesterday ) Merger of Two Neutron Stars! https://cmns.umd.edu/news-events/features/3997 More on this later in the semester Lecture #14: Plan Light (cont d) Atomic physics Formation

### A star is at a distance of 1.3 parsecs, what is its parallax?

Stars Spectral lines from stars Binaries and the masses of stars Classifying stars: HR diagram Luminosity, radius, and temperature Vogt-Russell theorem Main sequence Evolution on the HR diagram A star

### 9/19/ 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

### Stars, Galaxies & the Universe (29:50) Professor C.C. Lang Exam #1 - Fall 2010 Wednesday, September 22 nd FORM B - SOLUTIONS

Stars, Galaxies & the Universe (29:50) Professor C.C. Lang Exam #1 - Fall 2010 Wednesday, September 22 nd FORM B - SOLUTIONS Questions 1-6 are True/False questions (worth 4 pts each): 1. The Sun is a Red

### Astronomy 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

### Our sole source of light and heat in the solar system. A very common star: a glowing g ball of gas held together by its own gravity and powered

The Sun Visible Image of the Sun Our sole source of light and heat in the solar system A very common star: a glowing g ball of gas held together by its own gravity and powered by nuclear fusion at its

### Chapter 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

Wallace Hall Academy Physics Department Advanced Higher Physics Astrophysics Problems Data Common Physical Quantities QUANTITY SYMBOL VALUE Gravitational acceleration g 9.8 m s -2 Radius of Earth R E 6.4

### Light: Transverse WAVE

Light Longitudinal WAVES Light: Transverse WAVE Light: Particle or wave Photon The Wave Nature of Light 1. Unlike other branches of science, astronomers cannot touch or do field work on their samples.

### ASTRO Fall 2012 LAB #7: The Electromagnetic Spectrum

ASTRO 1050 - Fall 2012 LAB #7: The Electromagnetic Spectrum ABSTRACT Astronomers rely on light to convey almost all of the information we have on distant astronomical objects. In addition to measuring

### Astro 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

### The 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)

### Lecture 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

### Chapter 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

### A Stellar Spectra 3. Stars shine at night (during the day too!). A star is a self-luminous sphere of gas. Stars are held together by gravity.

Stellar Spectra Relativity and Astrophysics Lecture 12 Terry Herter Outline What is a star? Stellar Spectra Kirchhoff s Laws Spectral Classification Spectral Types: O B A F G K M L T Stellar Photometry

### ASTR : 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

Sources of radiation Most important type of radiation is blackbody radiation. This is radiation that is in thermal equilibrium with matter at some temperature T. Lab source of blackbody radiation: hot

### ASTRONOMY 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

### Prentice Hall EARTH SCIENCE

Prentice Hall EARTH SCIENCE Tarbuck Lutgens Chapter 24 Studying the Sun 24.1 The Study of Light Electromagnetic Radiation Electromagnetic radiation includes gamma rays, X-rays, ultraviolet light, visible

### Chapter 4 Spectroscopy

Chapter 4 Spectroscopy The beautiful visible spectrum of the star Procyon is shown here from red to blue, interrupted by hundreds of dark lines caused by the absorption of light in the hot star s cooler

### Lecture 12. Measurements in Astronomy. Using Light. ASTR 111 Section 002. In astronomy, we need to make remote and indirect measurements

Lecture 12 ASTR 111 Section 002 Measurements in Astronomy In astronomy, we need to make remote and indirect measurements Think of an example of a remote and indirect measurement from everyday life Using

### Chapter 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,

### Chapter 28. Atomic Physics

Chapter 28 Atomic Physics Sir Joseph John Thomson J. J. Thomson 1856-1940 Discovered the electron Did extensive work with cathode ray deflections 1906 Nobel Prize for discovery of electron Early Models

### A100H 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

### SPECTROSCOPY PRELAB. 2) Name the 3 types of spectra and, in 1 sentence each, describe them.

NAME: SPECTROSCOPY PRELAB 1) What is a spectrum? 2) Name the 3 types of spectra and, in 1 sentence each, describe them. a. b. c. 3) Use Wien s law to calculate the surface temperature of the star Alnilam

### Astronomy 1102 Exam #1 Chapters 1,2,5,6 & 16

Astronomy 1102 Exam #1 Chapters 1,2,5,6 & 16 Chapter 1 Degrees- basic unit of angle measurement, designated by the symbol -a full circle is divided into 360 and a right angle measures 90. arc minutes-one-sixtieth

### Foundations of Astronomy 13e Seeds. Chapter 6. Light and Telescopes

Foundations of Astronomy 13e Seeds Chapter 6 Light and Telescopes Guidepost In this chapter, you will consider the techniques astronomers use to study the Universe What is light? How do telescopes work?

### Light! Lecture 3, Oct. 8! Astronomy 102, Autumn 2009! Oct. 8, 2009 #1. Astronomy 102, Autumn 2009, E. Agol & J. Dalcanton U.W.

Light! Lecture 3, Oct. 8! Astronomy 102, Autumn 2009! Oct. 8, 2009 #1 Questions of the Day! I. What is light?! II. What are the wave/particle properties of light?! III. How do energy and wavelength vary

### Astronomy 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

### Astronomy 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?

### Telescopes have Three Powers

Telescopes have Three Powers 1. Light Gathering Power: The ability to collect light 2. Resolving Power: The ability to see fine details 3. Magnifying Power: The ability to make objects look bigger Pizzas!!!

### ESAC VOSPEC SCIENCE TUTORIAL

SCIENCE ARCHIVES AND VO TEAM ESAC VOSPEC SCIENCE TUTORIAL COMPARING SPECTRA OF THE SUN AND SIMILAR STARS THEORY SECTION Tutorial created by Luis Sánchez, ESAC SOHO Archive scientist, adapted from the Tracking

### Preview. Atomic Physics Section 1. Section 1 Quantization of Energy. Section 2 Models of the Atom. Section 3 Quantum Mechanics

Atomic Physics Section 1 Preview Section 1 Quantization of Energy Section 2 Models of the Atom Section 3 Quantum Mechanics Atomic Physics Section 1 TEKS The student is expected to: 8A describe the photoelectric

### Midterm Exam. IT Posting scores Finding out about missed questions Reminder about dropping lowest of 3

Midterm Exam #&%?@)#\$! IT Posting scores Finding out about missed questions Reminder about dropping lowest of 3 Nature of Light 10/3 Apparent versus Actual Brightness 10/6 Electromagnetic Spectrum of Light

### Announcements. One more bit of vocabulary about waves

Announcements Homework 5 now available; due on Sunday, Nov. 16 before midnight No class on Tuesday, Nov. 11 (Veteran s Day) Midterm 2 on Wednesday, Nov. 12 Study materials now available on class web page;

### How does your eye form an Refraction

Astronomical Instruments Eyes and Cameras: Everyday Light Sensors How does your eye form an image? How do we record images? How does your eye form an image? Refraction Refraction is the bending of light

### Problem Set 4 is due Thursday. Problem Set 5 will be out today or tomorrow. Launch Latest from MASCOT

1 Problem Set 4 is due Thursday. Problem Set 5 will be out today or tomorrow. Launch Latest from MASCOT 3 Continuous Spectra: Thermal Radiation The equations below quantitatively summarize the light-emitting

Astronomy 1143 Final Exam Review Answers Prof. Pradhan April 24, 2015 What is Science? 1. Explain the difference between astronomy and astrology. 2. What number is the metric system based around? What

### Chapter 6. Atoms and Starlight

Chapter 6 Atoms and Starlight What is light? Light is an electromagnetic wave. Wavelength and Frequency wavelength frequency = speed of light = constant Particles of Light Particles of light are called