Question 1

__________________ is/are caused by the interaction of light waves with the telescope's apertures and thus limit the detail visible in an image.

Accepted Answer

The answer of __________________ is/are caused by the interaction of...

Question 2

Observations of radio waves from astronomical objects suffer from poorer resolution than visible observations with the same size dish (or mirror) because

Accepted Answer

A)  the signals are so weak in the radio region. 
B)  the wavelength of radio waves is much longer than the wavelengths of visible light. 
C)  radio telescopes are generally much smaller in diameter than optical telescopes. 
D)  it is very difficult to detect radio waves. 
E)  radio telescopes don't use solid mirrors. 
A)  the signals are so weak in the radio region. 
B)  the wavelength of radio waves is much longer than the wavelengths of visible light. 
C)  radio telescopes are generally much smaller in diameter than optical telescopes. 
D)  it is very difficult to detect radio waves. 
E)  radio telescopes don't use solid mirrors.

Question 3

Light can behave as a particle or as a wave.

Accepted Answer

A) True 
 B)False

Question 4

Earth's atmosphere is fully transparent only to visible and radio light.

Accepted Answer

A) True 
 B)False

Question 5

Resolving power refers to the ability of a telescope to resolve fine detail.

Accepted Answer

A) True 
 B)False

Question 6

What statement below best describes the behavior of light encountering the objective lens of a refracting telescope?

Accepted Answer

A)  All light is absorbed as it travels through a dense, transparent material. 
B)  White light from astronomical objects is emitted by the lens. 
C)  Light rays are focused to form an image after they pass through the lens. 
D)  Light rays are focused to form an image after they reflect off the lens. 
A)  All light is absorbed as it travels through a dense, transparent material. 
B)  White light from astronomical objects is emitted by the lens. 
C)  Light rays are focused to form an image after they pass through the lens. 
D)  Light rays are focused to form an image after they reflect off the lens.

Question 7

Electromagnetic radiation, or light, travels at speed ___________ m/s.

Accepted Answer

3 × 108,or

Question 8

Which kind of telescope is shown and where is it located?

Accepted Answer

A)  radio, space 
B)  radio, ground 
C)  optical, space 
D)  optical, ground 
A)  radio, space 
B)  radio, ground 
C)  optical, space 
D)  optical, ground

Question 9

Which of the following types of electromagnetic radiation has the greatest energy?

Accepted Answer

A)  X-rays 
B)  visible light 
C)  radio 
D)  gamma rays 
E)  infrared radiation 
A)  X-rays 
B)  visible light 
C)  radio 
D)  gamma rays 
E)  infrared radiation

Question 10

The ____________________ of a telescope is determined by the size of the primary lens or mirror.

Accepted Answer

light-gath

Question 11

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 other choices are correct. 
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 other choices are correct.

Question 12

_________ is absorbed by water in Earth's atmosphere and requires that telescopes for observing at these wavelengths be placed on mountain tops or in space.

Accepted Answer

A)  Infrared radiation 
B)  Ultraviolet radiation 
C)  Radio wave radiation 
D)  X-ray radiation 
E)  Visible light 
A)  Infrared radiation 
B)  Ultraviolet radiation 
C)  Radio wave radiation 
D)  X-ray radiation 
E)  Visible light

Question 13

Why are nearly all recently built astronomical telescopes reflectors instead of refractors?

Accepted Answer

Refracting telescopes suffer from chroma

Question 14

One of the advantages of charge-coupled devices over photographic plates is that a CCD can record bright and faint objects on the same exposure.

Accepted Answer

A) True 
 B)False

Question 15

What is the wavelength of the longest wavelength light that can be seen with the human eye?

Accepted Answer

A)  400 nm 
B)  4000 nm 
C)  7000 nm 
D)  700 nm 
E)  3 × 108 m 
A)  400 nm 
B)  4000 nm 
C)  7000 nm 
D)  700 nm 
E)  3 × 108 m

Question 16

A laser guide star is a true star.

Accepted Answer

A) True 
 B)False

Question 17

A telescope whose primary is a lens and contains no mirrors is a(n) _______ telescope.

Accepted Answer

A)  refracting 
B)  reflecting 
C)  deflecting 
D)  compound 
E)  retracting 
A)  refracting 
B)  reflecting 
C)  deflecting 
D)  compound 
E)  retracting

Question 18

Which of the following types of electromagnetic radiation has the smallest frequency?

Accepted Answer

A)  X-rays 
B)  visible light 
C)  radio 
D)  gamma rays 
E)  infrared radiation 
A)  X-rays 
B)  visible light 
C)  radio 
D)  gamma rays 
E)  infrared radiation

Question 19

The resolving power for light of 550 nm of an optical telescope with a diameter of 232 cm is

Accepted Answer

A)  0.05 arc seconds. 
B)  232 arc seconds. 
C)  2.32 arc seconds. 
D)  5 arc seconds. 
E)  11.6 arc seconds. 
A)  0.05 arc seconds. 
B)  232 arc seconds. 
C)  2.32 arc seconds. 
D)  5 arc seconds. 
E)  11.6 arc seconds.

Question 20

The primary mirrors of most radio telescopes is similar to the primary mirror 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.

__________________ is/are caused by the interaction of light waves with the telescope's apertures and thus limit the detail visible in an image.

Observations of radio waves from astronomical objects suffer from poorer resolution than visible observations with the same size dish (or mirror) because

Light can behave as a particle or as a wave.

Earth's atmosphere is fully transparent only to visible and radio light.

Resolving power refers to the ability of a telescope to resolve fine detail.

What statement below best describes the behavior of light encountering the objective lens of a refracting telescope?

Electromagnetic radiation, or light, travels at speed ___________ m/s.

Which kind of telescope is shown and where is it located?

Which of the following types of electromagnetic radiation has the greatest energy?

The ____________________ of a telescope is determined by the size of the primary lens or mirror.

Blue light differs from red light in that

_________ is absorbed by water in Earth's atmosphere and requires that telescopes for observing at these wavelengths be placed on mountain tops or in space.

Why are nearly all recently built astronomical telescopes reflectors instead of refractors?

One of the advantages of charge-coupled devices over photographic plates is that a CCD can record bright and faint objects on the same exposure.

What is the wavelength of the longest wavelength light that can be seen with the human eye?

A laser guide star is a true star.

A telescope whose primary is a lens and contains no mirrors is a(n) _______ telescope.

Which of the following types of electromagnetic radiation has the smallest frequency?

The resolving power for light of 550 nm of an optical telescope with a diameter of 232 cm is

The primary mirrors of most radio telescopes is similar to the primary mirror of a reflecting optical telescope in that

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

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Exam 5: Light and Telescopes

__________________ is/are caused by the interaction of light waves with the telescope's apertures and thus limit the detail visible in an image.

Observations of radio waves from astronomical objects suffer from poorer resolution than visible observations with the same size dish (or mirror) because

Light can behave as a particle or as a wave.

Earth's atmosphere is fully transparent only to visible and radio light.

Resolving power refers to the ability of a telescope to resolve fine detail.

What statement below best describes the behavior of light encountering the objective lens of a refracting telescope?

Electromagnetic radiation, or light, travels at speed ___________ m/s.

Which kind of telescope is shown and where is it located?

Which of the following types of electromagnetic radiation has the greatest energy?

The ____________________ of a telescope is determined by the size of the primary lens or mirror.

Blue light differs from red light in that

_________ is absorbed by water in Earth's atmosphere and requires that telescopes for observing at these wavelengths be placed on mountain tops or in space.

Why are nearly all recently built astronomical telescopes reflectors instead of refractors?

One of the advantages of charge-coupled devices over photographic plates is that a CCD can record bright and faint objects on the same exposure.

What is the wavelength of the longest wavelength light that can be seen with the human eye?

A laser guide star is a true star.

A telescope whose primary is a lens and contains no mirrors is a(n) _______ telescope.

Which of the following types of electromagnetic radiation has the smallest frequency?

The resolving power for light of 550 nm of an optical telescope with a diameter of 232 cm is

The primary mirrors of most radio telescopes is similar to the primary mirror of a reflecting optical telescope in that

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters