Question 1

The separation of red and blue light in single- lens telescopes is called aberration.

Accepted Answer

The answer of The separation of red and blue light...

Question 2

The Arecibo radio telescope is laid out like which optical telescope design?

Accepted Answer

A)   Cassegrain reflector
B)   Newtonian reflector
C)   grazing incidence reflector
D)   prime focus reflector
E)   Coude reflector

Question 3

One advantage of the Hubble Space Telescope over ground based ones is that

Accepted Answer

A)   its adaptive optics controls atmospheric blurring better.
B)   in orbit, it can operate close to its diffraction limit at visible wavelengths.
C)   it is larger than any Earth- based telescopes.
D)   it can make better observations of the ozone layer.
E)   it can better focus X- ray images.

Question 4

The large reflector, the 10 m Keck, gathers _ _ light than the 1.0 m Yerkes refractor.

Accepted Answer

A)   an equal amount of
B)   100 times less
C)   10 times more
D)   100 times more
E)   10 times less

Question 5

What are adaptive optics designed to overcome? How is this done?

Accepted Answer

Adaptive optics attempt to overcome the ...

Question 6

Explain three advantages the Hubble Space Telescope has over all ground- based telescopes.

Accepted Answer

In space, HST can focus on infrared and ultraviolet waves invisible to ground- based observers. With no air, the seeing for Hubble is always perfect and images are much sharper than when viewed through our turbulent blanket of air, even with the best adaptive optics. As the Hubble orbits the Earth, it can be turned to view anything in the sky and not be limited by the local horizon.

Question 7

A telescope with an 8- inch mirror will collect twice as much light as one with a 4- inch mirror.

Accepted Answer

A) True 
 B)False  False

Question 8

Grazing incidence optics are critical to focusing
A) infrared radiation.
B) radio waves.
C) X- rays.
D) ultraviolet light.
E) gamma rays.

Accepted Answer

The answer of Grazing incidence optics are critical to focusing
A)...

Question 9

The 400" Keck reflector can see objects 100 times fainter than the 40" Yerkes lens.

Accepted Answer

A) True 
 B)False

Question 10

In general, as a telescope's diameter increases, its angular resolution _.

Accepted Answer

increases ...

Question 11

Galileo is credited with designing the first reflector telescope.

Accepted Answer

A) True 
 B)False  False

Question 12

Discuss several disadvantages of refractor versus reflector telescopes.

Accepted Answer

Refractors must use lenses, and thus all...

Question 13

When used in a single instrument to greatly enhance its resolution, the four separate mirrors of the VLT act as a(n) .

Accepted Answer

The answer of When used in a single instrument to...

Question 14

Why were the two Keck 400" telescopes placed together atop Mauna Kea?

Accepted Answer

The light of both telescopes is combined...

Question 15

The twinkling of starlight and the focusing of images by lenses are both due to of light.

Accepted Answer

A)   refraction
B)   reflection
C)   transmission
D)   polarization
E)   aberration

Question 16

What are some advantages of radio telescopes over optical telescopes?

Accepted Answer

Radio telescopes can be used day or nigh...

Question 17

A major advantage of a Newtonian reflector over a refractor is

Accepted Answer

A)   the elimination of chromatic aberration.
B)   the central hole in the mirror is smaller.
C)   its compact size.
D)   there are only two lenses to grind.
E)   the elimination of the secondary mirror.

Question 18

You are a novice telescope builder. Should you attempt a 6" Newtonian or Cassegrain reflector first? Why?

Accepted Answer

The Newtonian uses only a curved main mi...

Question 19

To a large degree, the has replaced photographic film for astronomical imaging.

Accepted Answer

The answer of To a large degree, the has replaced...

Question 20

The simplest reflector telescope design is the prime focus reflector.

Accepted Answer

A) True 
 B)False

Exam 4: Telescopes: the Tools of Astronomy

The separation of red and blue light in single- lens telescopes is called aberration.

Correct Answer
verified

The Arecibo radio telescope is laid out like which optical telescope design?

Correct Answer
verified

One advantage of the Hubble Space Telescope over ground based ones is that

Correct Answer
verified

The large reflector, the 10 m Keck, gathers _ _ light than the 1.0 m Yerkes refractor.

Correct Answer
verified

What are adaptive optics designed to overcome? How is this done?

Correct Answer
verified
Adaptive optics attempt to overcome the ...
View Answer

Explain three advantages the Hubble Space Telescope has over all ground- based telescopes.

A telescope with an 8- inch mirror will collect twice as much light as one with a 4- inch mirror.

Correct Answer
verified
False

Grazing incidence optics are critical to focusing A) infrared radiation. B) radio waves. C) X- rays. D) ultraviolet light. E) gamma rays.

Correct Answer
verified

The 400" Keck reflector can see objects 100 times fainter than the 40" Yerkes lens.

Correct Answer
verified

In general, as a telescope's diameter increases, its angular resolution _.

Correct Answer
verified
increases ...
View Answer

Galileo is credited with designing the first reflector telescope.

Correct Answer
verified
False

Discuss several disadvantages of refractor versus reflector telescopes.

Correct Answer
verified
Refractors must use lenses, and thus all...
View Answer

When used in a single instrument to greatly enhance its resolution, the four separate mirrors of the VLT act as a(n) .

Correct Answer
verified

Why were the two Keck 400" telescopes placed together atop Mauna Kea?

Correct Answer
verified
The light of both telescopes is combined...
View Answer

The twinkling of starlight and the focusing of images by lenses are both due to of light.

Correct Answer
verified

What are some advantages of radio telescopes over optical telescopes?

Correct Answer
verified
Radio telescopes can be used day or nigh...
View Answer

A major advantage of a Newtonian reflector over a refractor is

Correct Answer
verified

You are a novice telescope builder. Should you attempt a 6" Newtonian or Cassegrain reflector first? Why?

Correct Answer
verified
The Newtonian uses only a curved main mi...
View Answer

To a large degree, the has replaced photographic film for astronomical imaging.

Correct Answer
verified

The simplest reflector telescope design is the prime focus reflector.

Correct Answer
verified

Exam 4: Telescopes: the Tools of Astronomy

The separation of red and blue light in single- lens telescopes is called aberration.

Correct AnswerverifiedShow Answer

The Arecibo radio telescope is laid out like which optical telescope design?

Correct AnswerverifiedShow Answer

One advantage of the Hubble Space Telescope over ground based ones is that

Correct AnswerverifiedShow Answer

The large reflector, the 10 m Keck, gathers _ _ light than the 1.0 m Yerkes refractor.

Correct AnswerverifiedShow Answer

What are adaptive optics designed to overcome? How is this done?

Correct AnswerverifiedAdaptive optics attempt to overcome the ...View AnswerShow Answer

Explain three advantages the Hubble Space Telescope has over all ground- based telescopes.

A telescope with an 8- inch mirror will collect twice as much light as one with a 4- inch mirror.

Correct AnswerverifiedFalse

Grazing incidence optics are critical to focusing A) infrared radiation. B) radio waves. C) X- rays. D) ultraviolet light. E) gamma rays.

Correct AnswerverifiedShow Answer

The 400" Keck reflector can see objects 100 times fainter than the 40" Yerkes lens.

Correct AnswerverifiedShow Answer

In general, as a telescope's diameter increases, its angular resolution _.

Correct Answerverifiedincreases ...View AnswerShow Answer

Galileo is credited with designing the first reflector telescope.

Correct AnswerverifiedFalse

Discuss several disadvantages of refractor versus reflector telescopes.

Correct AnswerverifiedRefractors must use lenses, and thus all...View AnswerShow Answer

When used in a single instrument to greatly enhance its resolution, the four separate mirrors of the VLT act as a(n) .

Correct AnswerverifiedShow Answer

Why were the two Keck 400" telescopes placed together atop Mauna Kea?

Correct AnswerverifiedThe light of both telescopes is combined...View AnswerShow Answer

The twinkling of starlight and the focusing of images by lenses are both due to of light.

Correct AnswerverifiedShow Answer

What are some advantages of radio telescopes over optical telescopes?

Correct AnswerverifiedRadio telescopes can be used day or nigh...View AnswerShow Answer

A major advantage of a Newtonian reflector over a refractor is

Correct AnswerverifiedShow Answer

You are a novice telescope builder. Should you attempt a 6" Newtonian or Cassegrain reflector first? Why?

Correct AnswerverifiedThe Newtonian uses only a curved main mi...View AnswerShow Answer

To a large degree, the has replaced photographic film for astronomical imaging.

Correct AnswerverifiedShow Answer

The simplest reflector telescope design is the prime focus reflector.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Adaptive optics attempt to overcome the ...
View Answer

Correct Answer
verified
False

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
increases ...
View Answer

Correct Answer
verified
False

Correct Answer
verified
Refractors must use lenses, and thus all...
View Answer

Correct Answer
verified

Correct Answer
verified
The light of both telescopes is combined...
View Answer

Correct Answer
verified

Correct Answer
verified
Radio telescopes can be used day or nigh...
View Answer

Correct Answer
verified

Correct Answer
verified
The Newtonian uses only a curved main mi...
View Answer

Correct Answer
verified

Correct Answer
verified