Question 1

Star A and star B have the same temperature,but star B is more luminous than star A.What can you infer about these two stars?

Accepted Answer

A)  Star A must be bigger. 
B)  Star B must be bigger. 
C)  Star A must be redder. 
D)  Star B must be redder. 
E)  Nothing can be inferred from the information given. 
A)  Star A must be bigger. 
B)  Star B must be bigger. 
C)  Star A must be redder. 
D)  Star B must be redder. 
E)  Nothing can be inferred from the information given.

Question 2

Very hot,young stars,like those in Messier 2 emit most of their light in which part of the electromagnetic spectrum?

Accepted Answer

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

Question 3

If a wave's frequency doubles,its wavelength:

Accepted Answer

A)  is halved. 
B)  is also doubled. 
C)  is unchanged, as c is constant. 
D)  is now 4 times longer. 
E)  becomes 16 times longer. 
A)  is halved. 
B)  is also doubled. 
C)  is unchanged, as c is constant. 
D)  is now 4 times longer. 
E)  becomes 16 times longer.

Question 4

Both sound waves and electromagnetic radiation:

Accepted Answer

A)  travel at the speed of light. 
B)  require a medium to move through space. 
C)  can move through space without a medium. 
D)  transfer energy. 
E)  are transverse waves. 
A)  travel at the speed of light. 
B)  require a medium to move through space. 
C)  can move through space without a medium. 
D)  transfer energy. 
E)  are transverse waves.

Question 5

Stefan's Law says:

Accepted Answer

A)  the hotter a star's surface, the bluer it looks to us. 
B)  E = mc². 
C)  the energy radiated by a blackbody is proportional to T³. 
D)  that if the Sun's temperature were doubled, it would give off 16X more energy. 
E)  that doubling the star's temperature would also double its peak wavelength. 
A)  the hotter a star's surface, the bluer it looks to us. 
B)  E = mc². 
C)  the energy radiated by a blackbody is proportional to T³. 
D)  that if the Sun's temperature were doubled, it would give off 16X more energy. 
E)  that doubling the star's temperature would also double its peak wavelength.

Question 6

What is white light? Why do we perceive different colors with a prism?

Accepted Answer

White light is composed of all the color

Question 7

What does the phenomenon of interference demonstrate?

Accepted Answer

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

Question 8

Why can't we be certain that the Andromeda Galaxy exists today?

Accepted Answer

Since it lies 2.5 million ligh

Question 9

How can Wein's law be used to determine the temperature of a star?

Accepted Answer

Careful analysis of the blackbody curve

Question 10

The temperature scale that places zero at the point where all atomic and molecular motion ceases is:

Accepted Answer

A)  Fahrenheit. 
B)  Celsius. 
C)  Kelvin. 
D)  centigrade. 
E)  Ransom. 
A)  Fahrenheit. 
B)  Celsius. 
C)  Kelvin. 
D)  centigrade. 
E)  Ransom.

Question 11

Star A has a temperature 1/2 that of star B,but star A is 3 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 12

How can you determine the distance to a spacecraft from the time it takes its radio signal to reach Earth?

Accepted Answer

In vacuum,all electromagnetic radiation,

Question 13

The frequency of a water wave gives us its height.

Accepted Answer

A) True 
 B)False

Question 14

Give and explain an example of the use of the Doppler Effect on the highway.

Accepted Answer

The radar gun of a highway pat

Question 15

Describe the relationship between frequency and wavelength.

Accepted Answer

The higher the frequ

Question 16

As a star's temperature increases,the frequency of peak emission also increases.

Accepted Answer

A) True 
 B)False

Question 17

Which of these is constant for ALL types of electromagnetic radiation in a vacuum?

Accepted Answer

A)  amplitude 
B)  wavelength 
C)  frequency 
D)  velocity 
E)  photon energy 
A)  amplitude 
B)  wavelength 
C)  frequency 
D)  velocity 
E)  photon energy

Question 18

Star A and star B have the same temperature,but different luminosities.What can you infer about these two stars?

Accepted Answer

A)  Star A must be bigger. 
B)  Star B must be bigger. 
C)  Star A must be redder. 
D)  Star B must be redder. 
E)  Nothing can be inferred from the information given. 
A)  Star A must be bigger. 
B)  Star B must be bigger. 
C)  Star A must be redder. 
D)  Star B must be redder. 
E)  Nothing can be inferred from the information given.

Question 19

Wein's law relates the peak wavelength of the blackbody to its size.The larger the black body,the shorter its peak wavelength.

Accepted Answer

A) True 
 B)False

Question 20

Knowing the peak emission wavelength of a blackbody allows you to determine its ________.

Accepted Answer

The answer of Knowing the peak emission wavelength of a...

Exam 3: Radiation: Information from the Cosmos

Star A and star B have the same temperature,but star B is more luminous than star A.What can you infer about these two stars?

Very hot,young stars,like those in Messier 2 emit most of their light in which part of the electromagnetic spectrum?

If a wave's frequency doubles,its wavelength:

Both sound waves and electromagnetic radiation:

Stefan's Law says:

What is white light? Why do we perceive different colors with a prism?

What does the phenomenon of interference demonstrate?

Why can't we be certain that the Andromeda Galaxy exists today?

How can Wein's law be used to determine the temperature of a star?

The temperature scale that places zero at the point where all atomic and molecular motion ceases is:

Star A has a temperature 1/2 that of star B,but star A is 3 times bigger than star B.Which statement below is correct?

How can you determine the distance to a spacecraft from the time it takes its radio signal to reach Earth?

The frequency of a water wave gives us its height.

Give and explain an example of the use of the Doppler Effect on the highway.

Describe the relationship between frequency and wavelength.

As a star's temperature increases,the frequency of peak emission also increases.

Which of these is constant for ALL types of electromagnetic radiation in a vacuum?

Star A and star B have the same temperature,but different luminosities.What can you infer about these two stars?

Wein's law relates the peak wavelength of the blackbody to its size.The larger the black body,the shorter its peak wavelength.

Knowing the peak emission wavelength of a blackbody allows you to determine its ________.

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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