Question 1

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 2

While gravity is always attractive, electromagnetic forces are always repulsive.

Accepted Answer

A) True 
 B)False

Question 3

What is true of a blackbody?

Accepted Answer

A) It appears black to us, regardless of its temperature. 
B) Its energy is not a continuum. 
C) Its energy peaks at the wavelength determined by its temperature. 
D) If its temperature doubled, the peak in its curve would be doubled in wavelength. 
E) It has a complete absence of thermal energy. 
A) It appears black to us, regardless of its temperature. 
B) Its energy is not a continuum. 
C) Its energy peaks at the wavelength determined by its temperature. 
D) If its temperature doubled, the peak in its curve would be doubled in wavelength. 
E) It has a complete absence of thermal energy.

Question 4

As white light passes through a prism, the red (longer)wavelengths bend less than the blue(shorter)wavelengths, so forming the rainbow of colors.

Accepted Answer

A) True 
 B)False

Question 5

The part of the electromagnetic spectrum with the shortest wavelengths is called ________.

Accepted Answer

The answer of The part of the electromagnetic spectrum with...

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

In blackbody radiation, the energy is radiated uniformly in every region of the spectrum, sothe radiating body appears black in color.

Accepted Answer

A) True 
 B)False

Question 8

There are no radio telescopes in space because:

Accepted Answer

A) no one has built an antenna large enough to reach astronomical objects yet. 
B) radio telescopes are too fragile and expensive to make to put into space. 
C) there is too much radio noise in space, so a radio telescope won't work out there. 
D) radio waves penetrate Earth's atmosphere so there is no need to put one in space. 
E) you need an array, like the VLA, to detect ANY radio radiation, so it is just not realistic to putan entire array in space. 
A) no one has built an antenna large enough to reach astronomical objects yet. 
B) radio telescopes are too fragile and expensive to make to put into space. 
C) there is too much radio noise in space, so a radio telescope won't work out there. 
D) radio waves penetrate Earth's atmosphere so there is no need to put one in space. 
E) you need an array, like the VLA, to detect ANY radio radiation, so it is just not realistic to putan entire array in space.

Question 9

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 10

As the Sun evolves into a red giant in the distant future, then according to Wien's Law:

Accepted Answer

A) most of its energy must become shorter in wavelength. 
B) its peak on the Planck curve will move into the infrared. 
C) its total luminosity must decrease. 
D) it will disappear from the universe of visible light. 
E) its light will be slowed down by its increasing mass. 
A) most of its energy must become shorter in wavelength. 
B) its peak on the Planck curve will move into the infrared. 
C) its total luminosity must decrease. 
D) it will disappear from the universe of visible light. 
E) its light will be slowed down by its increasing mass.

Question 11

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 12

Wien's law relates the peak wavelength of the blackbody to its size. The larger theblackbody, the shorter its peak wavelength.

Accepted Answer

A) True 
 B)False

Question 13

Of all the forms of electromagnetic radiation, the one with the lowest frequency is:

Accepted Answer

A) gamma rays. 
B) ultraviolet rays. 
C) visible light. 
D) microwaves. 
E) radio waves. 
A) gamma rays. 
B) ultraviolet rays. 
C) visible light. 
D) microwaves. 
E) radio waves.

Exam 3: Radiation: Information From the Cosmos

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

While gravity is always attractive, electromagnetic forces are always repulsive.

What is true of a blackbody?

As white light passes through a prism, the red (longer)wavelengths bend less than the blue(shorter)wavelengths, so forming the rainbow of colors.

The part of the electromagnetic spectrum with the shortest wavelengths is called ________.

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

In blackbody radiation, the energy is radiated uniformly in every region of the spectrum, sothe radiating body appears black in color.

There are no radio telescopes in space because:

A wave's velocity is the product of the:

As the Sun evolves into a red giant in the distant future, then according to Wien's Law:

Electromagnetic radiation:

Wien's law relates the peak wavelength of the blackbody to its size. The larger theblackbody, the shorter its peak wavelength.

Of all the forms of electromagnetic radiation, the one with the lowest frequency is:

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: Earths 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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