Question 1

The process of combining signals from separate telescopes to improve resolution is called ____________________.

Accepted Answer

The answer of The process of combining signals from separate...

Question 2

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 3

An ordinary glass lens forms an image by ____________ of light.

Accepted Answer

A)  reflection 
B)  refraction 
C)  diffraction 
A)  reflection 
B)  refraction 
C)  diffraction

Question 4

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

Accepted Answer

The answer of Why are nearly all recently built astronomical...

Question 5

The optical shape of segmented mirrors is controlled by computer-driven thrusters under the mirrors in what is called

Accepted Answer

A)  an achromatic lens. 
B)  active optics. 
C)  a Schmidt-Cassegrain design. 
D)  a Newtonian design. 
E)  interferometry. 
A)  an achromatic lens. 
B)  active optics. 
C)  a Schmidt-Cassegrain design. 
D)  a Newtonian design. 
E)  interferometry.

Question 6

What are some new techniques and technologies that enable construction of optical telescopes with very large mirrors?

Accepted Answer

The answer of What are some new techniques and technologies...

Question 7

The diagram below illustrates the layout and light path of a reflecting telescope of the ____________________ design.

Accepted Answer

The answer of The diagram below illustrates the layout and...

Question 8

Increasing the diameter of a telescope

Accepted Answer

A)  I, II, III, & IV 
B)  I, II, & III 
C)  I, II, & IV 
D)  III & IV 
E)  I & II 
A)  I, II, III, & IV 
B)  I, II, & III 
C)  I, II, & IV 
D)  III & IV 
E)  I & II

Question 9

All radio telescopes are refracting telescopes.

Accepted Answer

A) True 
 B)False

Question 10

What statement below best describes the refraction of light?

Accepted Answer

A)  The absorption of light as it travels through a dense, transparent material. 
B)  The spreading out of white light according to wavelength. 
C)  The change in direction of a light ray as it passes to a medium of different optical density. 
D)  The change in direction of a ray of light as it reflects off a surface. 
A)  The absorption of light as it travels through a dense, transparent material. 
B)  The spreading out of white light according to wavelength. 
C)  The change in direction of a light ray as it passes to a medium of different optical density. 
D)  The change in direction of a ray of light as it reflects off a surface.

Question 11

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 12

There are ____ nanometers in one meter.

Accepted Answer

A)  1*103 
B)  1*-3 
C)  1*109 
D)  1*10-9 
E)  400 
A)  1*103 
B)  1*-3 
C)  1*109 
D)  1*10-9 
E)  400

Question 13

The main reason for positioning many radio telescopes across a large area and combining the signals is

Accepted Answer

A)  to observe more objects in a shorter amount of time. 
B)  provide a backup system if one or more of the telescopes go down. 
C)  to produce higher resolution images. 
D)  to avoid interference between signals from the separate telescopes. 
E)  to account for the motion of objects in the sky as a result of the Earth's rotation. 
A)  to observe more objects in a shorter amount of time. 
B)  provide a backup system if one or more of the telescopes go down. 
C)  to produce higher resolution images. 
D)  to avoid interference between signals from the separate telescopes. 
E)  to account for the motion of objects in the sky as a result of the Earth's rotation.

Question 14

Explain why the majority of large modern telescopes are not refractors.

Accepted Answer

The answer of Explain why the majority of large modern...

The process of combining signals from separate telescopes to improve resolution is called ____________________.

Blue light differs from red light in that

An ordinary glass lens forms an image by ____________ of light.

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

The optical shape of segmented mirrors is controlled by computer-driven thrusters under the mirrors in what is called

What are some new techniques and technologies that enable construction of optical telescopes with very large mirrors?

The diagram below illustrates the layout and light path of a reflecting telescope of the ____________________ design.

Increasing the diameter of a telescope

All radio telescopes are refracting telescopes.

What statement below best describes the refraction of light?

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?

There are ____ nanometers in one meter.

The main reason for positioning many radio telescopes across a large area and combining the signals is

Explain why the majority of large modern telescopes are not refractors.

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

The Origin of the Solar System

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

The process of combining signals from separate telescopes to improve resolution is called ____________________.

Blue light differs from red light in that

An ordinary glass lens forms an image by ____________ of light.

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

The optical shape of segmented mirrors is controlled by computer-driven thrusters under the mirrors in what is called

What are some new techniques and technologies that enable construction of optical telescopes with very large mirrors?

The diagram below illustrates the layout and light path of a reflecting telescope of the ____________________ design.

Increasing the diameter of a telescope

All radio telescopes are refracting telescopes.

What statement below best describes the refraction of light?

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?

There are ____ nanometers in one meter.

The main reason for positioning many radio telescopes across a large area and combining the signals is

Explain why the majority of large modern telescopes are not refractors.

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

The Origin of the Solar System

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