Question 1

Calculate the resolution of an interferometric array consisting of five 10-m radio telescopes,each located 1,000 meters apart from each other and observing a distant object at a wavelength of 21 cm.

Accepted Answer

θ = 2.06 × 10⁵ × (λ/D) where λ ...

Question 2

Samples of which celestial object(s) have been brought back to Earth to be studied in detail?

Accepted Answer

A)  a comet
B)  the solar wind
C)  an asteroid
D)  the Moon
E)  all of the aboveF) A) and D)
G) A) and B)

Question 3

Label the eyepiece,primary mirror,secondary mirror,focus,and focal length of the telescope below.

Accepted Answer

This telescope is a reflecting telescope...

Question 4

Point sources look brighter when viewed through a telescope.

Accepted Answer

A) True 
 B)False

Question 5

The SETI project's Allen Telescope Array will have 350 radio dishes,each with an individual diameter of 6 m,spread out over a circle whose diameter is 1 km.What would this array's spatial resolution be when it operates at 6,000 MHz?

Accepted Answer

A)  10 arcsec
B)  0.10 arcsec
C)  1 arcsec
D)  10 arcmin
E)  1.0 arcminF) B) and E)
G) B) and C)

Question 6

Label the eyepiece,lens,focus,and focal length of the telescope below.

Accepted Answer

This telescope is a refracting telescope...

Question 7

Typically,video is shot using 24 to 30 frames per second (one frame each 33 to 42 ms) .If a filmmaker shot new experimental video at 100 frames per second (one frame each 1 ms) ,how would it look during playback to the human eye?

Accepted Answer

A)  It would look like the video was being fast-forwarded.
B)  It would look like the video was about the same as normal video.
C)  It would look like the video was being played back in slow motion.
D)  It would look like a slideshow,a series of pictures on the screen each for a perceptible amount of time.
E)  It would look like the video was about the same speed as normal video,but blurry.F) A) and E)
G) All of the above

Question 8

The path of red light is deflected by a larger angle than blue light when passing through a glass prism.

Accepted Answer

A) True 
 B)False

Question 9

In 2008,the Cassini spacecraft made a flyby of Enceladus,one of the icy moons of Saturn.If the spacecraft's high resolution camera had an angular resolution of 3 arcsec,and it flew at an altitude of 23 km above Enceladus's surface,how large an object could be resolved on the surface?

Accepted Answer

A)  3 m
B)  30 cm
C)  30 km
D)  5 cm
E)  50 mF) D) and E)
G) All of the above

Question 10

The magnification of a telescope depends on the focal length of the telescope and:

Accepted Answer

A)  the size of the aperture
B)  the type of telescope (refracting vs.reflecting) 
C)  the wavelengths being observed
D)  the focal length of the eyepiece
E)  the angular resolution of the telescopeF) D) and E)
G) A) and C)

Question 11

The major advantage CCDs have over other imaging techniques is that:

Accepted Answer

A)  they have a higher quantum efficiency
B)  they have a linear response to light
C)  they yield output in digital format
D)  they operate at visible and near-infrared wavelengths
E)  All of the above are true.F) C) and D)
G) A) and D)

Question 12

Telescopes and satellites such as COBE,WMAP,and Planck are designed to detect microwave radiation emitted by:

Accepted Answer

A)  galaxies
B)  black holes
C)  planets
D)  the Big Bang
E)  starsF) A) and C)
G) B) and C)

Question 13

What is the angular resolution of a 1-m,ground-based,optical telescope that observes at a wavelength of 600 nm compared to that of a 300-ft,single-dish radio telescope that observes at a wavelength of 21 cm?

Accepted Answer

The angular resolution of the 1-m,ground...

Question 14

A prism is able to spread white light out into a spectrum of colors based on the property of:

Accepted Answer

A)  reflection
B)  refraction
C)  magnification
D)  resolution
E)  aberrationF) A) and E)
G) A) and D)

Question 15

Arrays of radio telescopes can produce much better resolution than single-dish telescopes because they work based on the principle of:

Accepted Answer

A)  reflection
B)  refraction
C)  dispersion
D)  diffraction
E)  interferenceF) B) and E)
G) A) and C)

Question 16

If we could increase the quantum efficiency of the human eye,it would:

Accepted Answer

A)  allow humans to see a larger range of wavelengths
B)  allow humans to see better at night,or other low-light conditions
C)  increase the resolution of the human eye
D)  decrease the resolution of the human eye
E)  not make a difference in the sight of the human eyeF) A) and B)
G) B) and C)

Question 17

The diffraction limit of a 4-meter telescope is _________ than that of a 2-meter telescope.

Accepted Answer

A)  two times larger
B)  four times larger
C)  four times smaller
D)  two times smaller
E)  It depends on the type of telescope.F) B) and D)
G) B) and C)

Question 18

Photography provides an improvement over naked-eye observations because:

Accepted Answer

A)  it is possible to observe a larger field of view with photographic plates
B)  the quantum efficiency is higher for photographic plates
C)  the image resolution is much better for photographic plates
D)  it is possible to detect fainter objects with the use of photographic plates
E)  the integration time is much shorter with the use of photographic platesF) All of the above
G) None of the above

Question 19

The image quality of most optical telescopes is limited by atmospheric refraction experienced by light as it passes through the Earth's atmosphere.

Accepted Answer

A) True 
 B)False

Question 20

Explain how adaptive optics help compensate for atmospheric seeing.

Accepted Answer

Slight perturbances in the atmosphere ca...

Exam 6: The Tools of the Astronomer

Label the eyepiece,lens,focus,and focal length of the telescope below.

Correct AnswerverifiedThis telescope is a refracting telescope...View AnswerShow Answer

Explain how adaptive optics help compensate for atmospheric seeing.

Correct AnswerverifiedSlight perturbances in the atmosphere ca...View AnswerShow Answer

The major advantage CCDs have over other imaging techniques is that:

Correct AnswerverifiedShow Answer

Calculate the resolution of an interferometric array consisting of five 10-m radio telescopes,each located 1,000 meters apart from each other and observing a distant object at a wavelength of 21 cm.

Correct Answerverifiedθ = 2.06 × 105 × (λ/D) where λ ...View AnswerShow Answer

The path of red light is deflected by a larger angle than blue light when passing through a glass prism.

Correct AnswerverifiedShow Answer

Label the eyepiece,primary mirror,secondary mirror,focus,and focal length of the telescope below.

Correct AnswerverifiedThis telescope is a reflecting telescope...View AnswerShow Answer

Point sources look brighter when viewed through a telescope.

Correct AnswerverifiedShow Answer

Samples of which celestial object(s) have been brought back to Earth to be studied in detail?

Correct AnswerverifiedShow Answer

Photography provides an improvement over naked-eye observations because:

Correct AnswerverifiedShow Answer

Telescopes and satellites such as COBE,WMAP,and Planck are designed to detect microwave radiation emitted by:

Correct AnswerverifiedShow Answer

Arrays of radio telescopes can produce much better resolution than single-dish telescopes because they work based on the principle of:

Correct AnswerverifiedShow Answer

A prism is able to spread white light out into a spectrum of colors based on the property of:

Correct AnswerverifiedShow Answer

The magnification of a telescope depends on the focal length of the telescope and:

Correct AnswerverifiedShow Answer

Typically,video is shot using 24 to 30 frames per second (one frame each 33 to 42 ms) .If a filmmaker shot new experimental video at 100 frames per second (one frame each 1 ms) ,how would it look during playback to the human eye?

Correct AnswerverifiedShow Answer

If we could increase the quantum efficiency of the human eye,it would:

Correct AnswerverifiedShow Answer

The SETI project's Allen Telescope Array will have 350 radio dishes,each with an individual diameter of 6 m,spread out over a circle whose diameter is 1 km.What would this array's spatial resolution be when it operates at 6,000 MHz?

Correct AnswerverifiedShow Answer

In 2008,the Cassini spacecraft made a flyby of Enceladus,one of the icy moons of Saturn.If the spacecraft's high resolution camera had an angular resolution of 3 arcsec,and it flew at an altitude of 23 km above Enceladus's surface,how large an object could be resolved on the surface?

Correct AnswerverifiedShow Answer

What is the angular resolution of a 1-m,ground-based,optical telescope that observes at a wavelength of 600 nm compared to that of a 300-ft,single-dish radio telescope that observes at a wavelength of 21 cm?

Correct AnswerverifiedThe angular resolution of the 1-m,ground...View AnswerShow Answer

The diffraction limit of a 4-meter telescope is _________ than that of a 2-meter telescope.

Correct AnswerverifiedShow Answer

The image quality of most optical telescopes is limited by atmospheric refraction experienced by light as it passes through the Earth's atmosphere.

Correct AnswerverifiedShow Answer

Correct Answer
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This telescope is a refracting telescope...
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Correct Answer
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Slight perturbances in the atmosphere ca...
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Correct Answer
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Correct Answer
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θ = 2.06 × 10⁵ × (λ/D) where λ ...
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Correct Answer
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This telescope is a reflecting telescope...
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Correct Answer
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Correct Answer
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The angular resolution of the 1-m,ground...
View Answer

Correct Answer
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Correct Answer
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