Question 1

The largest optical telescope ever constructed was a refracting telescope.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is not required for the normal operation of Canada's CHIME telescope?

Accepted Answer

A)  sidereal tracking 
B)  interferometry 
C)  protection from radio interference 
D)  Earth's rotation 
A)  sidereal tracking 
B)  interferometry 
C)  protection from radio interference 
D)  Earth's rotation

Question 3

A(n) _________________ _____________________ uses a mirror as its objective.

Accepted Answer

reflecting

Question 4

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

Accepted Answer

A)  X-rays 
B)  radio waves 
C)  gamma rays 
D)  infrared radiation 
A)  X-rays 
B)  radio waves 
C)  gamma rays 
D)  infrared radiation

Question 5

Why do astronomers build radio telescopes?

Accepted Answer

A)  Radio waves give a different view of the universe. 
B)  Radio waves from space reach the Earth's surface. 
C)  Radio telescopes can detect signals from aliens. 
D)  Radio telescopes can be much larger than optical telescopes. 
A)  Radio waves give a different view of the universe. 
B)  Radio waves from space reach the Earth's surface. 
C)  Radio telescopes can detect signals from aliens. 
D)  Radio telescopes can be much larger than optical telescopes.

Question 6

What happens to a telescope's light-gathering power and resolving power when you increase its diameter?

Accepted Answer

A)  Its light-gathering power and resolving power both increase. 
B)  Its light-gathering power increases and its resolving power decreases. 
C)  Its light-gathering power decreases and its resolving power increases. 
D)  Its light-gathering power and resolving power both decrease. 
A)  Its light-gathering power and resolving power both increase. 
B)  Its light-gathering power increases and its resolving power decreases. 
C)  Its light-gathering power decreases and its resolving power increases. 
D)  Its light-gathering power and resolving power both decrease.

Question 7

What type of telescope is a radio telescope?

Accepted Answer

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

Question 8

What does the word "radiation" mean when used by scientists?

Accepted Answer

A)  invisible forms of light such as X-rays and radio waves 
B)  the light emitted by black holes and protostars 
C)  high-energy particles from nuclear reactors 
D)  anything that spreads out from a central source 
A)  invisible forms of light such as X-rays and radio waves 
B)  the light emitted by black holes and protostars 
C)  high-energy particles from nuclear reactors 
D)  anything that spreads out from a central source

Question 9

Why can't a telescope image be magnified to show any level of detail?

Accepted Answer

A)  Diffraction limits the amount of detail that is visible. 
B)  Telescopes only view a small region of the sky. 
C)  Magnification depends on focal length. 
D)  Resolving power depends on wavelength. 
A)  Diffraction limits the amount of detail that is visible. 
B)  Telescopes only view a small region of the sky. 
C)  Magnification depends on focal length. 
D)  Resolving power depends on wavelength.

Question 10

What type of telescope has a lens as its primary and contains no mirrors?

Accepted Answer

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

Question 11

Interferometry is easiest to use with telescopes that observe at very short wavelengths.

Accepted Answer

A) True 
 B)False

Question 12

A(n) ____________________ telescope has a primary that is a lens.

Accepted Answer

The answer of A(n) ____________________ telescope has a primary that...

Question 13

What can be done to improve the resolving power of ground-based optical telescopes?

Accepted Answer

A)  Use them at longer wavelengths. 
B)  Equip them with an adaptive optics system. 
C)  Change them from reflectors to refractors. 
D)  Increase their focal length. 
A)  Use them at longer wavelengths. 
B)  Equip them with an adaptive optics system. 
C)  Change them from reflectors to refractors. 
D)  Increase their focal length.

Question 14

What is the relationship between colour and wavelength for light?

Accepted Answer

A)  Wavelength increases from blue light to red light. 
B)  Wavelength decreases from blue light to red light. 
C)  All colours of light have the same wavelength. 
D)  Wavelength depends on intensity, not colour. 
A)  Wavelength increases from blue light to red light. 
B)  Wavelength decreases from blue light to red light. 
C)  All colours of light have the same wavelength. 
D)  Wavelength depends on intensity, not colour.

Question 15

Suppose that you wanted to know how bright a star was at several different wavelengths of light. What kind of instrument would you use?

Accepted Answer

A)  a spectrograph 
B)  a seismograph 
C)  a photograph 
D)  a chromatic aberrator 
A)  a spectrograph 
B)  a seismograph 
C)  a photograph 
D)  a chromatic aberrator

Question 16

X-ray telescopes can be operated only from above Earth's atmosphere.

Accepted Answer

A) True 
 B)False

Question 17

What is the term for the technique of connecting multiple telescopes together to combine the images from each telescope?

Accepted Answer

A)  resolving power 
B)  active optics 
C)  adaptive optics 
D)  interferometry 
A)  resolving power 
B)  active optics 
C)  adaptive optics 
D)  interferometry

Question 18

An array of telescopes work together as an interferometer. How would the interferometer's performance change if the same telescopes were used but were spaced farther apart?

Accepted Answer

A)  The resolving power and the light-collecting power would increase. 
B)  The resolving power would increase and the light-collecting power would stay the same. 
C)  The resolving power and the light-collecting power would decrease. 
D)  The resolving power would decrease and the light-collecting power would stay the same. 
A)  The resolving power and the light-collecting power would increase. 
B)  The resolving power would increase and the light-collecting power would stay the same. 
C)  The resolving power and the light-collecting power would decrease. 
D)  The resolving power would decrease and the light-collecting power would stay the same.

Question 19

The light-gathering power of a telescope increases as the size of the primary increases.

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

A)  to provide a backup system if one or more of the telescopes go down 
B)  to produce higher resolution images 
C)  to prevent interference between signals from the separate telescopes 
D)  to compensate for the motion of objects in the sky as a result of the Earth's rotation 
A)  to provide a backup system if one or more of the telescopes go down 
B)  to produce higher resolution images 
C)  to prevent interference between signals from the separate telescopes 
D)  to compensate for the motion of objects in the sky as a result of the Earth's rotation

The largest optical telescope ever constructed was a refracting telescope.

Which of the following is not required for the normal operation of Canada's CHIME telescope?

A(n) _ _____ uses a mirror as its objective.

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

Why do astronomers build radio telescopes?

What happens to a telescope's light-gathering power and resolving power when you increase its diameter?

What type of telescope is a radio telescope?

What does the word "radiation" mean when used by scientists?

Why can't a telescope image be magnified to show any level of detail?

What type of telescope has a lens as its primary and contains no mirrors?

Interferometry is easiest to use with telescopes that observe at very short wavelengths.

A(n) ____________________ telescope has a primary that is a lens.

What can be done to improve the resolving power of ground-based optical telescopes?

What is the relationship between colour and wavelength for light?

Suppose that you wanted to know how bright a star was at several different wavelengths of light. What kind of instrument would you use?

X-ray telescopes can be operated only from above Earth's atmosphere.

What is the term for the technique of connecting multiple telescopes together to combine the images from each telescope?

An array of telescopes work together as an interferometer. How would the interferometer's performance change if the same telescopes were used but were spaced farther apart?

The light-gathering power of a telescope increases as the size of the primary increases.

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

The Scale of the Cosmos: Space and Time

Users Guide to the Sky: Patterns and Cycles

The Origin of Modern Astronomy

The Sun: the Closest Star

The Family of Stars

The Structure and Formation of Stars

The Deaths of Stars

The Milky Way Galaxy

Galaxies

Cosmology in the 21st Century

Planet Formation and Exoplanets

Comparative Planetology of the Terrestrial Planets

The Outer Solar System

Life on Other Worlds

Filters

Exam 4: Astronomical Telescopes and Instruments: Extending Humanitys Vision

The largest optical telescope ever constructed was a refracting telescope.

Which of the following is not required for the normal operation of Canada's CHIME telescope?

A(n) _________________ _____________________ uses a mirror as its objective.

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

Why do astronomers build radio telescopes?

What happens to a telescope's light-gathering power and resolving power when you increase its diameter?

What type of telescope is a radio telescope?

What does the word "radiation" mean when used by scientists?

Why can't a telescope image be magnified to show any level of detail?

What type of telescope has a lens as its primary and contains no mirrors?

Interferometry is easiest to use with telescopes that observe at very short wavelengths.

A(n) ____________________ telescope has a primary that is a lens.

What can be done to improve the resolving power of ground-based optical telescopes?

What is the relationship between colour and wavelength for light?

Suppose that you wanted to know how bright a star was at several different wavelengths of light. What kind of instrument would you use?

X-ray telescopes can be operated only from above Earth's atmosphere.

What is the term for the technique of connecting multiple telescopes together to combine the images from each telescope?

An array of telescopes work together as an interferometer. How would the interferometer's performance change if the same telescopes were used but were spaced farther apart?

The light-gathering power of a telescope increases as the size of the primary increases.

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

The Scale of the Cosmos: Space and Time

Users Guide to the Sky: Patterns and Cycles

The Origin of Modern Astronomy

The Sun: the Closest Star

The Family of Stars

The Structure and Formation of Stars

The Deaths of Stars

The Milky Way Galaxy

Galaxies

Cosmology in the 21st Century

Planet Formation and Exoplanets

Comparative Planetology of the Terrestrial Planets

The Outer Solar System

Life on Other Worlds

Filters

A(n) _ _____ uses a mirror as its objective.