Question 1

Far infrared astronomy must be done from high-flying aircraft because

Accepted Answer

A)  far infrared radiation is absorbed low in Earth's atmosphere. 
B)  far infrared photons are quite energetic. 
C)  far infrared telescopes are not very heavy. 
D)  far infrared sources are very bright. 
E)  none of the above. 
A)  far infrared radiation is absorbed low in Earth's atmosphere. 
B)  far infrared photons are quite energetic. 
C)  far infrared telescopes are not very heavy. 
D)  far infrared sources are very bright. 
E)  none of the above.

Question 2

Radio telescopes which use dishes to gather radio waves are ____ telescopes.

Accepted Answer

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

Question 3

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 4

A larger-objective lens shows ____________ a smaller-objective lens.

Accepted Answer

A)  more detail than 
B)  less detail than 
C)  the same amount of detail as 
A)  more detail than 
B)  less detail than 
C)  the same amount of detail as

Question 5

The amount of energy a photon carries depends on its wavelength.

Accepted Answer

A) True 
 B)False

Question 6

____ is absorbed by ozone in Earth's atmosphere that is located between 20 km and 40 km above Earth's surface. Therefore, telescopes to observe this radiation must be placed in space.

Accepted Answer

A)  Infrared radiation 
B)  Ultraviolet radiation 
C)  Radio wave radiation 
D)  X-ray radiation 
E)  Visible light 
A)  Infrared radiation 
B)  Ultraviolet radiation 
C)  Radio wave radiation 
D)  X-ray radiation 
E)  Visible light

Question 7

____ is absorbed by water in Earth's atmosphere and requires that telescopes for observing at these wavelengths be placed on mountain tops or in space.

Accepted Answer

A)  Infrared radiation 
B)  Ultraviolet radiation 
C)  Radio wave radiation 
D)  X-ray radiation 
E)  Visible light 
A)  Infrared radiation 
B)  Ultraviolet radiation 
C)  Radio wave radiation 
D)  X-ray radiation 
E)  Visible light

Question 8

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

Accepted Answer

light-gath

Question 9

An achromatic lens

Accepted Answer

A)  is used to correct spherical aberration in reflecting telescopes. 
B)  is used to correct chromatic aberration in refracting telescopes. 
C)  is used to correct spherical aberration in refracting telescopes. 
D)  is used to correct chromatic aberration in reflecting telescopes. 
E)  contains two mirrors and focuses the light back through the primary mirror. 
A)  is used to correct spherical aberration in reflecting telescopes. 
B)  is used to correct chromatic aberration in refracting telescopes. 
C)  is used to correct spherical aberration in refracting telescopes. 
D)  is used to correct chromatic aberration in reflecting telescopes. 
E)  contains two mirrors and focuses the light back through the primary mirror.

Question 10

The resolving power for light of 550 nm of an optical telescope with a diameter of 232 cm is

Accepted Answer

A)  0.05 arc seconds. 
B)  232 arc seconds. 
C)  2.32 arc seconds. 
D)  5 arc seconds. 
E)  11.6 arc seconds. 
A)  0.05 arc seconds. 
B)  232 arc seconds. 
C)  2.32 arc seconds. 
D)  5 arc seconds. 
E)  11.6 arc seconds.

Question 11

Long wavelength visible light

Accepted Answer

A)  will have a greater energy than short wavelength visible light. 
B)  will have a speed that is faster than short wavelength light. 
C)  has a higher frequency than short wavelength visible light. 
D)  will appear blue in color to the average human eye. 
E)  will appear red in color to the average human eye. 
A)  will have a greater energy than short wavelength visible light. 
B)  will have a speed that is faster than short wavelength light. 
C)  has a higher frequency than short wavelength visible light. 
D)  will appear blue in color to the average human eye. 
E)  will appear red in color to the average human eye.

Question 12

The Hubble Space Telescope objective mirror is not affected by

Accepted Answer

A)  bad seeing. 
B)  chromatic aberration. 
C)  diffraction. 
D)  Answers b and c 
E)  Answers a and b 
A)  bad seeing. 
B)  chromatic aberration. 
C)  diffraction. 
D)  Answers b and c 
E)  Answers a and b

Question 13

Which of the waves below has the shortest wavelength?

Accepted Answer

A)  gamma rays 
B)  X-rays 
C)  visible light 
D)  infrared 
E)  radio 
A)  gamma rays 
B)  X-rays 
C)  visible light 
D)  infrared 
E)  radio

Question 14

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

Accepted Answer

reflecting

Question 15

In a reflecting telescope, the objective is a mirror.

Accepted Answer

A) True 
 B)False

Question 16

The Very Long Baseline Array (VLBA)

Accepted Answer

A)  is the highest resolution optical telescope ever built. 
B)  is located in Arecibo, Puerto Rico. 
C)  is a matched pair of 8 m telescopes, one of which is in Chile and the other in Hawaii. 
D)  is an air-borne infrared telescope. 
E)  is a set of radio telescopes linked together electronically to provide very high resolution. 
A)  is the highest resolution optical telescope ever built. 
B)  is located in Arecibo, Puerto Rico. 
C)  is a matched pair of 8 m telescopes, one of which is in Chile and the other in Hawaii. 
D)  is an air-borne infrared telescope. 
E)  is a set of radio telescopes linked together electronically to provide very high resolution.

Question 17

Chromatic aberration occurs in a ____ telescope when ____.

Accepted Answer

A)  reflecting; different colors of light do not focus at the same point 
B)  refracting; different colors of light do not focus at the same point 
C)  reflecting; light of different wavelengths get absorbed by the mirror 
D)  refracting; light of different wavelengths get absorbed by the lens 
A)  reflecting; different colors of light do not focus at the same point 
B)  refracting; different colors of light do not focus at the same point 
C)  reflecting; light of different wavelengths get absorbed by the mirror 
D)  refracting; light of different wavelengths get absorbed by the lens

Question 18

One of the advantages of charge-coupled devices over photographic plates is that a CCD can record bright and faint objects on the same exposure.

Accepted Answer

A) True 
 B)False

Question 19

Why must telescopes that observe in the far infrared be cooled?

Accepted Answer

Telescopes that observe in the far infra

Question 20

The ____________________ is a measure of the finest detail that can be seen in an image.

Accepted Answer

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

Far infrared astronomy must be done from high-flying aircraft because

Radio telescopes which use dishes to gather radio waves are ____ telescopes.

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

A larger-objective lens shows ____________ a smaller-objective lens.

The amount of energy a photon carries depends on its wavelength.

____ is absorbed by ozone in Earth's atmosphere that is located between 20 km and 40 km above Earth's surface. Therefore, telescopes to observe this radiation must be placed in space.

____ is absorbed by water in Earth's atmosphere and requires that telescopes for observing at these wavelengths be placed on mountain tops or in space.

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

An achromatic lens

The resolving power for light of 550 nm of an optical telescope with a diameter of 232 cm is

Long wavelength visible light

The Hubble Space Telescope objective mirror is not affected by

Which of the waves below has the shortest wavelength?

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

In a reflecting telescope, the objective is a mirror.

The Very Long Baseline Array (VLBA)

Chromatic aberration occurs in a telescope when .

One of the advantages of charge-coupled devices over photographic plates is that a CCD can record bright and faint objects on the same exposure.

Why must telescopes that observe in the far infrared be cooled?

The ____________________ is a measure of the finest detail that can be seen in an image.

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

Exam 5: Light and Telescopes

Far infrared astronomy must be done from high-flying aircraft because

Radio telescopes which use dishes to gather radio waves are ____ telescopes.

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

A larger-objective lens shows ____________ a smaller-objective lens.

The amount of energy a photon carries depends on its wavelength.

____ is absorbed by ozone in Earth's atmosphere that is located between 20 km and 40 km above Earth's surface. Therefore, telescopes to observe this radiation must be placed in space.

____ is absorbed by water in Earth's atmosphere and requires that telescopes for observing at these wavelengths be placed on mountain tops or in space.

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

An achromatic lens

The resolving power for light of 550 nm of an optical telescope with a diameter of 232 cm is

Long wavelength visible light

The Hubble Space Telescope objective mirror is not affected by

Which of the waves below has the shortest wavelength?

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

In a reflecting telescope, the objective is a mirror.

The Very Long Baseline Array (VLBA)

Chromatic aberration occurs in a ____ telescope when ____.

One of the advantages of charge-coupled devices over photographic plates is that a CCD can record bright and faint objects on the same exposure.

Why must telescopes that observe in the far infrared be cooled?

The ____________________ is a measure of the finest detail that can be seen in an image.

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

Chromatic aberration occurs in a telescope when .