Question 1

A(n)____________________ uses a mirror as its objective.

Accepted Answer

reflecting

Question 2

Why must far-infrared astronomy be done from high-flying aircraft or spacecraft?

Accepted Answer

A) Far-infrared radiation is absorbed low in the Earth's atmosphere. 
B) Far-infrared photons are quite energetic. 
C) Far-infrared photons have long wavelengths. 
D) Far-infrared radiation is reflected from the top of the Earth's atmosphere. 
A) Far-infrared radiation is absorbed low in the Earth's atmosphere. 
B) Far-infrared photons are quite energetic. 
C) Far-infrared photons have long wavelengths. 
D) Far-infrared radiation is reflected from the top of the Earth's atmosphere.

Question 3

The ____________________ is a measure of the clarity of the atmosphere .

Accepted Answer

The answer of The ____________________ is a measure of the...

Question 4

Telescopes observing in the far ultraviolet can be carried in high-flying aircraft.

Accepted Answer

A) True 
 B)False

Question 5

In which way is a photon of blue light identical to a photon of red light?

Accepted Answer

A) energy 
B) speed 
C) wavelength 
D) frequency 
A) energy 
B) speed 
C) wavelength 
D) frequency

Question 6

What is the main reason for building large optical telescopes?

Accepted Answer

A) It's the best way to see through clouds and other light-absorbers in the atmosphere. 
B) It's the best way to collect as much light as possible from faint objects. 
C) It's the best way to nullify the blurring effects of the Earth's atmosphere and thus produce higher resolution images. 
D) It's the best way to magnify objects and make them brighter. 
A) It's the best way to see through clouds and other light-absorbers in the atmosphere. 
B) It's the best way to collect as much light as possible from faint objects. 
C) It's the best way to nullify the blurring effects of the Earth's atmosphere and thus produce higher resolution images. 
D) It's the best way to magnify objects and make them brighter.

Question 7

Explain how interferometry works.

Accepted Answer

The answer of Explain how interferometry works....

Question 8

When does chromatic aberration occur in a telescope?

Accepted Answer

A) when different colours of light do not focus at the same point in a reflecting telescope 
B) when different colours of light do not focus at the same point in a refracting telescope 
C) when light of different wavelengths gets absorbed by the mirror in a reflecting telescope 
D) when light of different wavelengths gets absorbed by the lens in a refracting telescope 
A) when different colours of light do not focus at the same point in a reflecting telescope 
B) when different colours of light do not focus at the same point in a refracting telescope 
C) when light of different wavelengths gets absorbed by the mirror in a reflecting telescope 
D) when light of different wavelengths gets absorbed by the lens in a refracting telescope

Question 9

Which of the following types of electromagnetic radiation has the smallest frequency?

Accepted Answer

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

Question 10

How does long wavelength visible light appear to the average human eye?

Accepted Answer

A) invisible 
B) green 
C) blue 
D) red 
A) invisible 
B) green 
C) blue 
D) red

Question 11

How is the objective of most radio telescopes similar to the objective of a reflecting optical telescope?

Accepted Answer

A) They are both bowl-shaped (concave). 
B) They are both hill-shaped (convex). 
C) They are typically the same size. 
D) They are both made of metal. 
A) They are both bowl-shaped (concave). 
B) They are both hill-shaped (convex). 
C) They are typically the same size. 
D) They are both made of metal.

Question 12

List three sources of light pollution and explain how they affect astronomical observations.

Accepted Answer

Three sources of light pollution include

Question 13

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

Accepted Answer

A) X-rays 
B) ultraviolet light 
C) gamma rays 
D) infrared radiation 
A) X-rays 
B) ultraviolet light 
C) gamma rays 
D) infrared radiation

Question 14

How do photons of blue light differ from photons of red light?

Accepted Answer

A) Blue light photons have more energy than photons of red light. 
B) Blue light photons have a lower frequency than photons of red light. 
C) Blue light photons have a longer wavelength than photons of red light. 
D) Blue light photons travel faster than photons of red light. 
A) Blue light photons have more energy than photons of red light. 
B) Blue light photons have a lower frequency than photons of red light. 
C) Blue light photons have a longer wavelength than photons of red light. 
D) Blue light photons travel faster than photons of red light.

Question 15

Which of the following has the most light-gathering power?

Accepted Answer

A) A telescope of 5 centimetres diameter and focal length of 50 centimetres. 
B) A telescope of 6 centimetres diameter and focal length of 100 centimetres. 
C) A telescope of 2 centimetres diameter and focal length of 100 centimetres. 
D) A telescope of 3 centimetres diameter and focal length of 75 centimetres. 
A) A telescope of 5 centimetres diameter and focal length of 50 centimetres. 
B) A telescope of 6 centimetres diameter and focal length of 100 centimetres. 
C) A telescope of 2 centimetres diameter and focal length of 100 centimetres. 
D) A telescope of 3 centimetres diameter and focal length of 75 centimetres.

Question 16

The ____________________ of a telescope is determined by the size of the objective.

Accepted Answer

light-gath

Question 17

Which of the following types of light has wavelengths that are longer than the wavelengths of visible light?

Accepted Answer

A) gamma rays 
B) ultraviolet 
C) infrared 
D) X-rays 
A) gamma rays 
B) ultraviolet 
C) infrared 
D) X-rays

Question 18

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

Accepted Answer

The answer of A(n)____________________ telescope has an objective that is...

Question 19

Why do radio telescopes have poor resolving power?

Accepted Answer

A) Their diameters are extremely large. 
B) The energy they receive is not electromagnetic radiation. 
C) Radio waves have long wavelengths. 
D) Radio waves travel at slow speeds. 
A) Their diameters are extremely large. 
B) The energy they receive is not electromagnetic radiation. 
C) Radio waves have long wavelengths. 
D) Radio waves travel at slow speeds.

Question 20

What type of telescope is most likely to suffer from chromatic aberration and have a low light-gathering power?

Accepted Answer

A) a small diameter reflecting telescope 
B) a small diameter refracting telescope 
C) a large diameter reflecting telescope 
D) a large diameter refracting telescope 
A) a small diameter reflecting telescope 
B) a small diameter refracting telescope 
C) a large diameter reflecting telescope 
D) a large diameter refracting telescope

A(n)____________________ uses a mirror as its objective.

Why must far-infrared astronomy be done from high-flying aircraft or spacecraft?

The ____________________ is a measure of the clarity of the atmosphere .

Telescopes observing in the far ultraviolet can be carried in high-flying aircraft.

In which way is a photon of blue light identical to a photon of red light?

What is the main reason for building large optical telescopes?

Explain how interferometry works.

When does chromatic aberration occur in a telescope?

Which of the following types of electromagnetic radiation has the smallest frequency?

How does long wavelength visible light appear to the average human eye?

How is the objective of most radio telescopes similar to the objective of a reflecting optical telescope?

List three sources of light pollution and explain how they affect astronomical observations.

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

How do photons of blue light differ from photons of red light?

Which of the following has the most light-gathering power?

The ____________________ of a telescope is determined by the size of the objective.

Which of the following types of light has wavelengths that are longer than the wavelengths of visible light?

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

Why do radio telescopes have poor resolving power?

What type of telescope is most likely to suffer from chromatic aberration and have a low light-gathering power?

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

A(n)____________________ uses a mirror as its objective.

Why must far-infrared astronomy be done from high-flying aircraft or spacecraft?

The ____________________ is a measure of the clarity of the atmosphere .

Telescopes observing in the far ultraviolet can be carried in high-flying aircraft.

In which way is a photon of blue light identical to a photon of red light?

What is the main reason for building large optical telescopes?

Explain how interferometry works.

When does chromatic aberration occur in a telescope?

Which of the following types of electromagnetic radiation has the smallest frequency?

How does long wavelength visible light appear to the average human eye?

How is the objective of most radio telescopes similar to the objective of a reflecting optical telescope?

List three sources of light pollution and explain how they affect astronomical observations.

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

How do photons of blue light differ from photons of red light?

Which of the following has the most light-gathering power?

The ____________________ of a telescope is determined by the size of the objective.

Which of the following types of light has wavelengths that are longer than the wavelengths of visible light?

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

Why do radio telescopes have poor resolving power?

What type of telescope is most likely to suffer from chromatic aberration and have a low light-gathering power?

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