Question 1

The Doppler Effect is a phenomenon that allows one to measure an object's:

Accepted Answer

A)  temperature. 
B)  radius. 
C)  radial motion. 
D)  tangential motion. 
E)  chemical composition. 
A)  temperature. 
B)  radius. 
C)  radial motion. 
D)  tangential motion. 
E)  chemical composition.

Question 2

Contrast the speeds of sound and light in watching a flash of lightning,then listening for the thunder to follow.

Accepted Answer

Light travels at 300,000 km/sec,so the f

Question 3

A blue star has a higher surface temperature than a red star.

Accepted Answer

A) True 
 B)False

Question 4

Star A has a temperature 1/2 that of star B,but star A is 5 times bigger than star B.Which statement below is correct?

Accepted Answer

A)  Star A is redder and dimmer than star B. 
B)  Star A is bluer and dimmer than star B. 
C)  Star A is redder and brighter than star B. 
D)  Star A is bluer and brighter than star B. 
E)  Star A and star B have the same color, but star A is brighter. 
A)  Star A is redder and dimmer than star B. 
B)  Star A is bluer and dimmer than star B. 
C)  Star A is redder and brighter than star B. 
D)  Star A is bluer and brighter than star B. 
E)  Star A and star B have the same color, but star A is brighter.

Question 5

Stars that appear blue or white in color are ________ than our yellow Sun.

Accepted Answer

The answer of Stars that appear blue or white in...

Question 6

Which form of electromagnetic radiation would be blocked in the stratosphere by ozone?

Accepted Answer

A)  cosmic rays 
B)  ultraviolet 
C)  visible light 
D)  infrared 
E)  microwaves 
A)  cosmic rays 
B)  ultraviolet 
C)  visible light 
D)  infrared 
E)  microwaves

Question 7

Increasing the temperature of a blackbody by a factor of 2 will increase its energy by a factor of:

Accepted Answer

A)  $ \sqrt{2} $ 
B)  4. 
C)  8. 
D)  16. 
E)  32. 
A)  $ \sqrt{2} $ 
B)  4. 
C)  8. 
D)  16. 
E)  32.

Question 8

Which type of radiation can be observed well from Earth's surface?

Accepted Answer

A)  gamma ray 
B)  X-ray 
C)  ultraviolet 
D)  visible 
E)  infrared 
A)  gamma ray 
B)  X-ray 
C)  ultraviolet 
D)  visible 
E)  infrared

Question 9

Give an example of the Doppler Effect being used in a baseball game.

Accepted Answer

The Doppler "gun" can focus on

Question 10

What is meant by the wavelength of light? By its frequency? Show how they are related to each other.

Accepted Answer

The wavelength is the distance between s

Question 11

What does the phenomenon of diffraction demonstrate?

Accepted Answer

A)  the wave nature of light 
B)  the polarization of light waves 
C)  the quantization of atomic orbitals 
D)  the particle nature of the photon 
E)  the process of ionization 
A)  the wave nature of light 
B)  the polarization of light waves 
C)  the quantization of atomic orbitals 
D)  the particle nature of the photon 
E)  the process of ionization

Question 12

At which of these Kelvin temperatures would a blackbody radiate mostly at visible wavelengths?

Accepted Answer

A)  6 K 
B)  60 K 
C)  600 K 
D)  6000 K 
E)  None of these; a blackbody doesn't radiate visible light. 
A)  6 K 
B)  60 K 
C)  600 K 
D)  6000 K 
E)  None of these; a blackbody doesn't radiate visible light.

Question 13

Star A and star B have the same temperature,but star A is 5 times bigger than star B.Which statement below is correct?

Accepted Answer

A)  Star A is redder and dimmer than star B. 
B)  Star A is bluer and dimmer than star B. 
C)  Star A is redder and brighter than star B. 
D)  Star A is bluer and brighter than star B. 
E)  Star A and star B have the same color, but star A is brighter. 
A)  Star A is redder and dimmer than star B. 
B)  Star A is bluer and dimmer than star B. 
C)  Star A is redder and brighter than star B. 
D)  Star A is bluer and brighter than star B. 
E)  Star A and star B have the same color, but star A is brighter.

Question 14

Changing the electric field will have no effect on the magnetic fields of a body.

Accepted Answer

A) True 
 B)False

Question 15

Electromagnetic radiation:

Accepted Answer

A)  can only travel in a dense medium. 
B)  has only the properties of waves. 
C)  can behave both as a wave and as a particle. 
D)  is the same as a sound wave. 
E)  has nothing in common with radio waves. 
A)  can only travel in a dense medium. 
B)  has only the properties of waves. 
C)  can behave both as a wave and as a particle. 
D)  is the same as a sound wave. 
E)  has nothing in common with radio waves.

Question 16

Why would a hotter star appear blue-white while a cooler star appear red or not be visible at all?

Accepted Answer

Stefan's law notes that the higher the t

Question 17

A wave's velocity is the product of the:

Accepted Answer

A)  frequency times the period of the wave. 
B)  period times the energy of the wave. 
C)  amplitude times the frequency of the wave. 
D)  frequency times the wavelength of the wave. 
E)  amplitude times the wavelength of the wave. 
A)  frequency times the period of the wave. 
B)  period times the energy of the wave. 
C)  amplitude times the frequency of the wave. 
D)  frequency times the wavelength of the wave. 
E)  amplitude times the wavelength of the wave.

Question 18

The greater the disturbance of the medium,the higher the amplitude of the wave.

Accepted Answer

A) True 
 B)False

Question 19

The total energy radiated by a blackbody depends on:

Accepted Answer

A)  the fourth power of its temperature. 
B)  the square of its temperature. 
C)  the square root of its temperature. 
D)  the cube root of its temperature. 
E)  the cube of its temperature. 
A)  the fourth power of its temperature. 
B)  the square of its temperature. 
C)  the square root of its temperature. 
D)  the cube root of its temperature. 
E)  the cube of its temperature.

Question 20

Consider this diagram.Which statement is true?

Accepted Answer

A)  The amplitude is 4. 
B)  The amplitude is 6. 
C)  The amplitude is 8. 
D)  The amplitude is 12. 
E)  The amplitude cannot be determined from this diagram. 
A)  The amplitude is 4. 
B)  The amplitude is 6. 
C)  The amplitude is 8. 
D)  The amplitude is 12. 
E)  The amplitude cannot be determined from this diagram.

Exam 3: Radiation: Information from the Cosmos

The Doppler Effect is a phenomenon that allows one to measure an object's:

Contrast the speeds of sound and light in watching a flash of lightning,then listening for the thunder to follow.

A blue star has a higher surface temperature than a red star.

Star A has a temperature 1/2 that of star B,but star A is 5 times bigger than star B.Which statement below is correct?

Stars that appear blue or white in color are ________ than our yellow Sun.

Which form of electromagnetic radiation would be blocked in the stratosphere by ozone?

Increasing the temperature of a blackbody by a factor of 2 will increase its energy by a factor of:

Which type of radiation can be observed well from Earth's surface?

Give an example of the Doppler Effect being used in a baseball game.

What is meant by the wavelength of light? By its frequency? Show how they are related to each other.

What does the phenomenon of diffraction demonstrate?

At which of these Kelvin temperatures would a blackbody radiate mostly at visible wavelengths?

Star A and star B have the same temperature,but star A is 5 times bigger than star B.Which statement below is correct?

Changing the electric field will have no effect on the magnetic fields of a body.

Electromagnetic radiation:

Why would a hotter star appear blue-white while a cooler star appear red or not be visible at all?

A wave's velocity is the product of the:

The greater the disturbance of the medium,the higher the amplitude of the wave.

The total energy radiated by a blackbody depends on:

Consider this diagram.Which statement is true?

Charting the Heavens: The Foundations of Astronomy

The Copernican Revolution: The Birth of Modern Science

Spectroscopy: The Inner Workings of Atoms

Telescopes: The Tools of Astronomy

The Solar System: Comparative Planetology and Formation Models

Earth: Our Home in Space

The Moon and Mercury: Scorched and Battered Worlds

Venus: Earth's Sister Planet

Mars: A Near Miss for Life?

Jupiter: Giant of the Solar System

Saturn: Spectacular Rings and Mysterious Moons

Uranus and Neptune: The Outer Worlds of the Solar System

Solar System Debris: Keys to Our Origin

Exoplanets: Planetary Systems Beyond Our Own

The Sun: Our Parent Star

The Stars: Giants,Dwarfs,and the Main Sequence

The Interstellar Medium: Gas and Dust among the Stars

Star Formation: A Traumatic Birth

Stellar Evolution: The Life and Death of a Star

Stellar Explosions: Novae,Supernovae,and the Formation of the Elements

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: A Spiral in Space

Galaxies: Building Blocks of the Universe

Galaxies and Dark Matter: The Large-Scale Structure of the Cosmos

Cosmology: The Big Bang and the Fate of the Universe

The Early Universe: Toward the Beginning of Time

Life in the Universe: Are We Alone?

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