Question 1

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

Accepted Answer

reflecting...

Question 2

Chromatic aberration occurs in a ____ telescope when ____.

Accepted Answer

A)   reflecting; different colors of light do not focus at the same point
B)   refracting; different colors of light do not focus at the same point
C)   reflecting; light of different wavelengths get absorbed by the mirror
D)   refracting; light of different wavelengths get absorbed by the lens

Question 3

The ____________________ is a measure of how many times larger the angular size of an object appears through a telescope.

Accepted Answer

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

Question 4

Radio telescopes which use dishes to gather radio waves are ____ telescopes.

Accepted Answer

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

Question 5

The Hubble Space Telescope objective mirror is not affected by

Accepted Answer

A)   bad seeing.
B)   chromatic aberration.
C)   diffraction.
D)   Answers b and c
E)   Answers a and b

Question 6

____ is absorbed by ozone in Earth's atmosphere that is located between 20 km and 40 km above Earth's surface. Therefore, telescopes to observe this radiation must be placed in space.

Accepted Answer

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

Question 7

The amount of energy a photon carries depends on its wavelength.

Accepted Answer

A) True 
 B)False

Question 8

A larger-objective lens shows ____________ a smaller-objective lens.

Accepted Answer

A)   more detail than
B)   less detail than
C)   the same amount of detail as

Question 9

Why must telescopes that observe in the far infrared be cooled?

Accepted Answer

Telescopes that observe in the far infra...

Question 10

Far infrared astronomy must be done from high-flying aircraft because

Accepted Answer

A)   far infrared radiation is absorbed low in Earth's atmosphere.
B)   far infrared photons are quite energetic.
C)   far infrared telescopes are not very heavy.
D)   far infrared sources are very bright.
E)   none of the above.

Question 11

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 12

In a reflecting telescope, the objective is a mirror.

Accepted Answer

A) True 
 B)False

Question 13

Which of the waves below has the shortest wavelength?

Accepted Answer

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

Question 14

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.

Question 15

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 16

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

Accepted Answer

light-gath...

Question 17

____ 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

Question 18

An achromatic lens

Accepted Answer

A)   is used to correct spherical aberration in reflecting telescopes.
B)   is used to correct chromatic aberration in refracting telescopes.
C)   is used to correct spherical aberration in refracting telescopes.
D)   is used to correct chromatic aberration in reflecting telescopes.
E)   contains two mirrors and focuses the light back through the primary mirror.

Question 19

Long wavelength visible light

Accepted Answer

A)   will have a greater energy than short wavelength visible light.
B)   will have a speed that is faster than short wavelength light.
C)   has a higher frequency than short wavelength visible light.
D)   will appear blue in color to the average human eye.
E)   will appear red in color to the average human eye.

Question 20

The Very Long Baseline Array (VLBA)

Accepted Answer

A)   is the highest resolution optical telescope ever built.
B)   is located in Arecibo, Puerto Rico.
C)   is a matched pair of 8 m telescopes, one of which is in Chile and the other in Hawaii.
D)   is an air-borne infrared telescope.
E)   is a set of radio telescopes linked together electronically to provide very high resolution.

Exam 5: Light and Telescopes

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

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An achromatic lens

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Which of the waves below has the shortest wavelength?

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A larger-objective lens shows ____________ a smaller-objective lens.

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

Radio telescopes which use dishes to gather radio waves are ____ telescopes.

Correct AnswerverifiedShow Answer

Far infrared astronomy must be done from high-flying aircraft because

Correct AnswerverifiedShow Answer

Chromatic aberration occurs in a ____ telescope when ____.

Correct AnswerverifiedShow Answer

The ____________________ is a measure of how many times larger the angular size of an object appears through a telescope.

Correct AnswerverifiedShow Answer

Why must telescopes that observe in the far infrared be cooled?

Correct AnswerAnswered by ExamLex AITelescopes that observe in the far infra...View AnswerShow Answer

____ is absorbed by ozone in Earth's atmosphere that is located between 20 km and 40 km above Earth's surface. Therefore, telescopes to observe this radiation must be placed in space.

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The amount of energy a photon carries depends on its wavelength.

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Long wavelength visible light

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The Hubble Space Telescope objective mirror is not affected by

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____ 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.

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The Very Long Baseline Array (VLBA)

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

Correct Answerverifiedreflecting...View AnswerShow Answer

In a reflecting telescope, the objective is a mirror.

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

Correct AnswerverifiedShow Answer

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light-gath...
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Chromatic aberration occurs in a telescope when .

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Telescopes that observe in the far infra...
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reflecting...
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