Question 1

Light can behave as a particle or as a wave.

Accepted Answer

A) True 
 B)False

Question 2

What does a nanometre measure?

Accepted Answer

A) frequency 
B) energy 
C) mass 
D) length 
A) frequency 
B) energy 
C) mass 
D) length

Question 3

Why were telescopes with very large,thin mirrors NOT built 50 years ago?

Accepted Answer

Telescopes with very large, thin mirrors

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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 6

X-rays easily penetrate the Earth's atmosphere and reach the ground from space.

Accepted Answer

A) True 
 B)False

Question 7

How do electronic cameras resemble photographic plates? How do they differ?

Accepted Answer

The answer of How do electronic cameras resemble photographic plates?...

Question 8

What is Very Long Baseline Interferometry (VLBI)?

Accepted Answer

A) a method to observe the largest possible areas of the sky in radio waves 
B) a method to observe the largest wavelength optical light 
C) linking optical telescopes in different hemispheres to observe the whole sky 
D) linking radio telescopes together electronically to provide very high resolution 
A) a method to observe the largest possible areas of the sky in radio waves 
B) a method to observe the largest wavelength optical light 
C) linking optical telescopes in different hemispheres to observe the whole sky 
D) linking radio telescopes together electronically to provide very high resolution

Question 9

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 10

Why can infrared telescopes operate from high-flying aircraft and high mountaintops,whereas X-ray telescopes must be placed in orbit?

Accepted Answer

The answer of Why can infrared telescopes operate from high-flying...

Question 11

How does the energy of a photon relate to the other properties of light?

Accepted Answer

A) Energy is directly proportional to the wavelength of the light. 
B) Energy is inversely proportional to the wavelength of the light. 
C) Energy depends only on the speed of the light. 
D) Energy is inversely proportional to the frequency of the light. 
A) Energy is directly proportional to the wavelength of the light. 
B) Energy is inversely proportional to the wavelength of the light. 
C) Energy depends only on the speed of the light. 
D) Energy is inversely proportional to the frequency of the light.

Question 12

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

Accepted Answer

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

Question 13

Which form of electromagnetic radiation travels fastest?

Accepted Answer

A) gamma rays 
B) radio waves 
C) all electromagnetic radiation travels at the same speed 
D) the speed of radiation depends on the brightness of the source 
A) gamma rays 
B) radio waves 
C) all electromagnetic radiation travels at the same speed 
D) the speed of radiation depends on the brightness of the source

Question 14

Which of the following telescope types must be used above the Earth's atmosphere?

Accepted Answer

A) an optical telescope 
B) a refracting telescope 
C) an X-ray telescope 
D) a radio telescope 
A) an optical telescope 
B) a refracting telescope 
C) an X-ray telescope 
D) a radio telescope

Question 15

What is the ratio of the light-gathering power of a 10-metre telescope to that of a 1-metre telescope?

Accepted Answer

A) 10 to 1 
B) 1 to 10 
C) 100 to 1 
D) 1 to 100 
A) 10 to 1 
B) 1 to 10 
C) 100 to 1 
D) 1 to 100

Question 16

Reflecting telescopes are no longer popular with astronomers because they are expensive and suffer from chromatic aberration.

Accepted Answer

A) True 
 B)False

Question 17

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 18

The main lens or mirror of a telescope is called the ____________________.

Accepted Answer

The answer of The main lens or mirror of a...

Question 19

What statement below best describes the refraction of light?

Accepted Answer

A) the absorption of light as it travels though 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 though 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 20

A new generation of ground-based telescopes are currently being built to overcome the limitations of the older large telescopes.How are these different from previous telescopes?

Accepted Answer

A) They can eliminate light pollution. 
B) They can detect X-rays. 
C) They use computers to control the shape of the mirror. 
D) They can see through clouds. 
A) They can eliminate light pollution. 
B) They can detect X-rays. 
C) They use computers to control the shape of the mirror. 
D) They can see through clouds.

Light can behave as a particle or as a wave.

What does a nanometre measure?

Why were telescopes with very large,thin mirrors NOT built 50 years ago?

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

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

X-rays easily penetrate the Earth's atmosphere and reach the ground from space.

How do electronic cameras resemble photographic plates? How do they differ?

What is Very Long Baseline Interferometry (VLBI)?

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

Why can infrared telescopes operate from high-flying aircraft and high mountaintops,whereas X-ray telescopes must be placed in orbit?

How does the energy of a photon relate to the other properties of light?

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

Which form of electromagnetic radiation travels fastest?

Which of the following telescope types must be used above the Earth's atmosphere?

What is the ratio of the light-gathering power of a 10-metre telescope to that of a 1-metre telescope?

Reflecting telescopes are no longer popular with astronomers because they are expensive and suffer from chromatic aberration.

What type of telescope is a radio telescope?

The main lens or mirror of a telescope is called the ____________________.

What statement below best describes the refraction of light?

A new generation of ground-based telescopes are currently being built to overcome the limitations of the older large telescopes.How are these different from previous telescopes?

The Scale of the Cosmos

User's Guide to the Sky

The Origin of Modern Astronomy

Sun Light and Sun Atoms

The Family of Stars

The Structure and Formation of Stars

The Deaths of Stars

The Milky Way Galaxy

Galaxies

Cosmology in the 21st Century

The Origin of the Solar System

Comparative Planetology of the Terrestrial Planets

Comparative Planetology of the Jovian Planets

Life on Other Worlds

Filters

Exam 4: Astronomical Telescopes and Instruments

Light can behave as a particle or as a wave.

What does a nanometre measure?

Why were telescopes with very large,thin mirrors NOT built 50 years ago?

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

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

X-rays easily penetrate the Earth's atmosphere and reach the ground from space.

How do electronic cameras resemble photographic plates? How do they differ?

What is Very Long Baseline Interferometry (VLBI)?

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

Why can infrared telescopes operate from high-flying aircraft and high mountaintops,whereas X-ray telescopes must be placed in orbit?

How does the energy of a photon relate to the other properties of light?

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

Which form of electromagnetic radiation travels fastest?

Which of the following telescope types must be used above the Earth's atmosphere?

What is the ratio of the light-gathering power of a 10-metre telescope to that of a 1-metre telescope?

Reflecting telescopes are no longer popular with astronomers because they are expensive and suffer from chromatic aberration.

What type of telescope is a radio telescope?

The main lens or mirror of a telescope is called the ____________________.

What statement below best describes the refraction of light?

A new generation of ground-based telescopes are currently being built to overcome the limitations of the older large telescopes.How are these different from previous telescopes?

The Scale of the Cosmos

User's Guide to the Sky

The Origin of Modern Astronomy

Sun Light and Sun Atoms

The Family of Stars

The Structure and Formation of Stars

The Deaths of Stars

The Milky Way Galaxy

Galaxies

Cosmology in the 21st Century

The Origin of the Solar System

Comparative Planetology of the Terrestrial Planets

Comparative Planetology of the Jovian Planets

Life on Other Worlds

Filters