Question 1

Reflecting telescopes are no longer popular with astronomers because they are expensive and suffer from chromatic aberration.

Accepted Answer

A) True 
 B)False

Question 2

What advantages does a large diameter astronomical telescope have over a telescope of a smaller diameter?

Accepted Answer

The answer of What advantages does a large diameter astronomical...

Question 3

Light can behave as a particle or as a wave.

Accepted Answer

A) True 
 B)False

Question 4

The objective of most radio telescopes is similar to the objective of a reflecting optical telescope in that

Accepted Answer

A)  they are both concave in shape 
B)  they are both convex in shape 
C)  they are typically the same size 
D)  they are both made of metal. 
E)  they have nothing in common. 
A)  they are both concave in shape 
B)  they are both convex in shape 
C)  they are typically the same size 
D)  they are both made of metal. 
E)  they have nothing in common.

Question 5

Ultraviolet radiation from a star

Accepted Answer

A)  will not penetrate Earth s atmosphere and reach the ground. 
B)  has a wavelength that is longer than the visible light emitted by the star. 
C)  has a wavelength that is shorter than the x-rays emitted by the star. 
D)  a and b 
E)  b and c 
A)  will not penetrate Earth s atmosphere and reach the ground. 
B)  has a wavelength that is longer than the visible light emitted by the star. 
C)  has a wavelength that is shorter than the x-rays emitted by the star. 
D)  a and b 
E)  b and c

Question 6

A ____ is a piece of glass with many small parallel lines etched on its surface to produce a spectrum.

Accepted Answer

A)  grating 
B)  spectrograph 
C)  photometer 
D)  charge-coupled device 
E)  prism 
A)  grating 
B)  spectrograph 
C)  photometer 
D)  charge-coupled device 
E)  prism

Question 7

What is the relationship between color and wavelength for light?

Accepted Answer

A)  Wavelength increases from blue light to red light 
B)  Wavelength decreases from blue light to red light 
C)  All colors of light have the same wavelength. 
D)  Wavelength depends on intensity not color. 
A)  Wavelength increases from blue light to red light 
B)  Wavelength decreases from blue light to red light 
C)  All colors of light have the same wavelength. 
D)  Wavelength depends on intensity not color.

Question 8

Which of the following features of a telescope determines its light gathering power?

Accepted Answer

A)  The focal length of the objective 
B)  The focal length of the eyepiece 
C)  The diameter of the objective 
D)  Length of the telescope tube 
E)  None of the above. 
A)  The focal length of the objective 
B)  The focal length of the eyepiece 
C)  The diameter of the objective 
D)  Length of the telescope tube 
E)  None of the above.

Question 9

The ____________________ of a telescope is determined by the size of the objective.

Accepted Answer

light-gath

Question 10

Radio telescopes have poor resolving power because

Accepted Answer

A)  their diameters are so large. 
B)  the energy they receive is not electromagnetic radiation. 
C)  radio waves have long wavelengths. 
D)  a and b 
E)  none of the above 
A)  their diameters are so large. 
B)  the energy they receive is not electromagnetic radiation. 
C)  radio waves have long wavelengths. 
D)  a and b 
E)  none of the above

Question 11

The pupil of the human eye is approximately 0.8 cm in diameter when adapted to the dark. The ratio of the light gathering power of a 1.6 m telescope to that of the human eye is ____.

Accepted Answer

A)  2 
B)  4 
C)  20 
D)  400 
E)  40,000 
A)  2 
B)  4 
C)  20 
D)  400 
E)  40,000

Question 12

The resolving power of a telescope is ____.

Accepted Answer

A)  a measure of the minimum angular separation that can be seen with the telescope. 
B)  a measure of the maximum angular separation that can be seen with the telescope. 
C)  a measure of the amount of light that the telescope can gather in one second. 
D)  the separation between the objective and the image. 
E)  a measure of how blurry object appear in the telescope. 
A)  a measure of the minimum angular separation that can be seen with the telescope. 
B)  a measure of the maximum angular separation that can be seen with the telescope. 
C)  a measure of the amount of light that the telescope can gather in one second. 
D)  the separation between the objective and the image. 
E)  a measure of how blurry object appear in the telescope.

Question 13

What causes chromatic aberration? Why does it not occur in reflecting telescopes?

Accepted Answer

The answer of What causes chromatic aberration? Why does it...

Question 14

Which of the following sequences of electromagnetic radiation is correct in order of increasing energy?

Accepted Answer

A)  Gamma rays, X-rays, infrared, radio 
B)  Radio, microwave, gamma rays, UV 
C)  Visible, UV, X-rays, gamma rays 
D)  Visible, microwave, radio, infrared 
E)  Infrared, visible, radio, X-rays 
A)  Gamma rays, X-rays, infrared, radio 
B)  Radio, microwave, gamma rays, UV 
C)  Visible, UV, X-rays, gamma rays 
D)  Visible, microwave, radio, infrared 
E)  Infrared, visible, radio, X-rays

Question 15

Blue light differs from red light in that

Accepted Answer

A)  blue light has a higher energy than red light. 
B)  blue light has a lower energy than red light. 
C)  blue light has a shorter wavelength than red light. 
D)  blue light has a longer wavelength than red light. 
E)  More than one of the above. 
A)  blue light has a higher energy than red light. 
B)  blue light has a lower energy than red light. 
C)  blue light has a shorter wavelength than red light. 
D)  blue light has a longer wavelength than red light. 
E)  More than one of the above.

Question 16

The main lens or mirror of a telescope is called the ____________________.

Accepted Answer

The answer of The main lens or mirror of a...

Question 17

The ____________________ is a measure of the finest detail that can be seen in an image.

Accepted Answer

The answer of The ____________________ is a measure of the...

Question 18

Interferometry

Accepted Answer

A)  is used to improve the resolving power. 
B)  decreases the chromatic aberration of a telescope. 
C)  works only for large x-ray and ultraviolet telescopes. 
D)  requires that radio telescopes be within a few hundred feet of each other. 
E)  none of the above 
A)  is used to improve the resolving power. 
B)  decreases the chromatic aberration of a telescope. 
C)  works only for large x-ray and ultraviolet telescopes. 
D)  requires that radio telescopes be within a few hundred feet of each other. 
E)  none of the above

Question 19

How does the nature of radio waves allow a radio telescope to use a wire mesh surface? Would you expect millimeter wavelength telescopes to need smoother surfaces than typical radio dishes? Why or Why not?

Accepted Answer

The nature of radio waves allows a radio

Question 20

A(n) ____________________ uses a mirror as its objective.

Accepted Answer

reflecting

Reflecting telescopes are no longer popular with astronomers because they are expensive and suffer from chromatic aberration.

What advantages does a large diameter astronomical telescope have over a telescope of a smaller diameter?

Light can behave as a particle or as a wave.

The objective of most radio telescopes is similar to the objective of a reflecting optical telescope in that

Ultraviolet radiation from a star

A ____ is a piece of glass with many small parallel lines etched on its surface to produce a spectrum.

What is the relationship between color and wavelength for light?

Which of the following features of a telescope determines its light gathering power?

The ____________________ of a telescope is determined by the size of the objective.

Radio telescopes have poor resolving power because

The pupil of the human eye is approximately 0.8 cm in diameter when adapted to the dark. The ratio of the light gathering power of a 1.6 m telescope to that of the human eye is ____.

The resolving power of a telescope is ____.

What causes chromatic aberration? Why does it not occur in reflecting telescopes?

Which of the following sequences of electromagnetic radiation is correct in order of increasing energy?

Blue light differs from red light in that

The main lens or mirror of a telescope is called the ____________________.

The ____________________ is a measure of the finest detail that can be seen in an image.

Interferometry

How does the nature of radio waves allow a radio telescope to use a wire mesh surface? Would you expect millimeter wavelength telescopes to need smoother surfaces than typical radio dishes? Why or Why not?

A(n) ____________________ uses a mirror as its objective.

Here and Now

Users Guide to the Sky: Patterns and Cycles

The Origin of Modern Astronomy

Sun Light and Sun Atoms

The Terrestrial Planets

The Outer Solar System

Origins of the Solar System and Extrasolar Planets

The Family of Stars

Structure and Formation of Stars

The Deaths of Stars

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

Life on Other Worlds

Filters

Exam 4: Light and Telescopes

Reflecting telescopes are no longer popular with astronomers because they are expensive and suffer from chromatic aberration.

What advantages does a large diameter astronomical telescope have over a telescope of a smaller diameter?

Light can behave as a particle or as a wave.

The objective of most radio telescopes is similar to the objective of a reflecting optical telescope in that

Ultraviolet radiation from a star

A ____ is a piece of glass with many small parallel lines etched on its surface to produce a spectrum.

What is the relationship between color and wavelength for light?

Which of the following features of a telescope determines its light gathering power?

The ____________________ of a telescope is determined by the size of the objective.

Radio telescopes have poor resolving power because

The pupil of the human eye is approximately 0.8 cm in diameter when adapted to the dark. The ratio of the light gathering power of a 1.6 m telescope to that of the human eye is ____.

The resolving power of a telescope is ____.

What causes chromatic aberration? Why does it not occur in reflecting telescopes?

Which of the following sequences of electromagnetic radiation is correct in order of increasing energy?

Blue light differs from red light in that

The main lens or mirror of a telescope is called the ____________________.

The ____________________ is a measure of the finest detail that can be seen in an image.

Interferometry

How does the nature of radio waves allow a radio telescope to use a wire mesh surface? Would you expect millimeter wavelength telescopes to need smoother surfaces than typical radio dishes? Why or Why not?

A(n) ____________________ uses a mirror as its objective.

Here and Now

Users Guide to the Sky: Patterns and Cycles

The Origin of Modern Astronomy

Sun Light and Sun Atoms

The Terrestrial Planets

The Outer Solar System

Origins of the Solar System and Extrasolar Planets

The Family of Stars

Structure and Formation of Stars

The Deaths of Stars

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

Life on Other Worlds

Filters