Question 1

A(n) ____________________ is used to measure the brightness and color of stars.

Accepted Answer

The answer of A(n) ____________________ is used to measure the...

Question 2

If the magnification of a telescope can be changed simply by exchanging eyepieces, why can't you just magnify objects to very large sizes by choosing an appropriate eyepiece?

Accepted Answer

The magnification of a telescope is inde

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

Observations of radio waves from astronomical objects suffer from poorer resolution than visible observations with the same size dish (or mirror) because

Accepted Answer

A)  the signals are so weak in the radio region. 
B)  the wavelength of radio waves is much longer than the wavelengths of visible light. 
C)  radio telescopes are generally much smaller in diameter than optical telescopes. 
D)  it is very difficult to detect radio waves. 
E)  radio telescopes don't use solid mirrors. 
A)  the signals are so weak in the radio region. 
B)  the wavelength of radio waves is much longer than the wavelengths of visible light. 
C)  radio telescopes are generally much smaller in diameter than optical telescopes. 
D)  it is very difficult to detect radio waves. 
E)  radio telescopes don't use solid mirrors.

Question 5

A telescope that suffers from chromatic aberration and has a low light-gathering power is most likely

Accepted Answer

A)  a small-diameter reflecting telescope. 
B)  a small-diameter refracting telescope. 
C)  a large-diameter refracting telescope. 
D)  a large-diameter reflecting telescope. 
E)  an infrared telescope. 
A)  a small-diameter reflecting telescope. 
B)  a small-diameter refracting telescope. 
C)  a large-diameter refracting telescope. 
D)  a large-diameter reflecting telescope. 
E)  an infrared telescope.

Question 6

Telescopes observing in the far ultraviolet can work from high-flying aircraft.

Accepted Answer

A) True 
 B)False

Question 7

What is the frequency of the shortest wavelength light that can be detected by the average human eye?

Accepted Answer

A)  0.0025 Hz 
B)  7.5*1014 Hz 
C)  3.0*108 m/s 
D)  700 nm 
E)  400 nm 
A)  0.0025 Hz 
B)  7.5*1014 Hz 
C)  3.0*108 m/s 
D)  700 nm 
E)  400 nm

Question 8

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

Accepted Answer

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

Question 9

The figure below shows a single lens with two rays of white light incident on it from the left. Sketch the paths of the blue, yellow, and red components of each of these rays to the point where the light from the upper and lower rays would meet.

Accepted Answer

The blue rays should come to a focus clo

Question 10

CCD stands for a

Accepted Answer

A)  photometer. 
B)  charge-coupled device. 
C)  spectrograph. 
D)  core collapse device. 
E)  grating. 
A)  photometer. 
B)  charge-coupled device. 
C)  spectrograph. 
D)  core collapse device. 
E)  grating.

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

A telescope that suffers from chromatic aberration and has a low light-gathering power is most likely

Accepted Answer

A)  a small-diameter objective reflecting telescope. 
B)  a small-diameter objective refracting telescope. 
C)  a large-diameter objective refracting telescope. 
D)  a large-diameter objective reflecting telescope. 
E)  the Hubble Space Telescope. 
A)  a small-diameter objective reflecting telescope. 
B)  a small-diameter objective refracting telescope. 
C)  a large-diameter objective refracting telescope. 
D)  a large-diameter objective reflecting telescope. 
E)  the Hubble Space Telescope.

Question 13

What is the wavelength of the shortest wavelength light visible to the human eye?

Accepted Answer

A)  400 nm 
B)  4000 nm 
C)  7000 nm 
D)  700 nm 
E)  3*108 m 
A)  400 nm 
B)  4000 nm 
C)  7000 nm 
D)  700 nm 
E)  3*108 m

Question 14

A wave on a lake is found to have a wavelength of 2 m and a frequency of 0.3 Hz. What is the speed of this wave?

Accepted Answer

The answer of A wave on a lake is found...

Question 15

The main reason for building large optical telescopes on Earth's surface is

Accepted Answer

A)  that there is a lot of money in science that needs to get spent. 
B)  to collect as much light as possible from faint objects. 
C)  to nullify the blurring effects of the Earth's atmosphere and thus produce higher resolution images. 
D)  to bring astronomical objects closer to make them brighter. 
E)  that the warm temperatures of the Earth's surface allow for easier telescope operation. 
A)  that there is a lot of money in science that needs to get spent. 
B)  to collect as much light as possible from faint objects. 
C)  to nullify the blurring effects of the Earth's atmosphere and thus produce higher resolution images. 
D)  to bring astronomical objects closer to make them brighter. 
E)  that the warm temperatures of the Earth's surface allow for easier telescope operation.

Question 16

Which has the larger light-gathering power?

Accepted Answer

A)  a telescope of 5 cm diameter and focal length of 50 cm 
B)  a telescope of 6 cm diameter and focal length of 100 cm 
C)  a telescope of 2 cm diameter and focal length of 100 cm 
D)  a telescope of 3 cm diameter and focal length of 75 cm 
E)  both b and c since they have the same focal length. 
A)  a telescope of 5 cm diameter and focal length of 50 cm 
B)  a telescope of 6 cm diameter and focal length of 100 cm 
C)  a telescope of 2 cm diameter and focal length of 100 cm 
D)  a telescope of 3 cm diameter and focal length of 75 cm 
E)  both b and c since they have the same focal length.

Question 17

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

Accepted Answer

A)  an optical telescope 
B)  the VLBA telescope 
C)  an X-ray telescope 
D)  a radio telescope 
E)  none of the above 
A)  an optical telescope 
B)  the VLBA telescope 
C)  an X-ray telescope 
D)  a radio telescope 
E)  none of the above

Question 18

The objective of most radio telescopes is similar to the objective of a reflecting optical telescope in that

Accepted Answer

A)  they are both concave in shape. 
B)  they are both convex in shape. 
C)  they are typically the same size. 
D)  they are both made of metal. 
E)  they have nothing in common. 
A)  they are both concave in shape. 
B)  they are both convex in shape. 
C)  they are typically the same size. 
D)  they are both made of metal. 
E)  they have nothing in common.

Question 19

What is the ratio of the light-gathering power of a 5-m telescope to that of a 0.5-m telescope?

Accepted Answer

A)  10 
B)  0.1 
C)  0.01 
D)  100 
E)  25 
A)  10 
B)  0.1 
C)  0.01 
D)  100 
E)  25

Question 20

A new generation of ground-based telescopes is currently being built that overcomes the limitations of the older large telescopes. Some of these new telescopes

Accepted Answer

A)  use segmented mirrors. 
B)  use mirrors that are very thin. 
C)  use active optics to control the shape of the mirror. 
D)  all of the above. 
E)  none of the above. 
A)  use segmented mirrors. 
B)  use mirrors that are very thin. 
C)  use active optics to control the shape of the mirror. 
D)  all of the above. 
E)  none of the above.

A(n) ____________________ is used to measure the brightness and color of stars.

If the magnification of a telescope can be changed simply by exchanging eyepieces, why can't you just magnify objects to very large sizes by choosing an appropriate eyepiece?

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

Observations of radio waves from astronomical objects suffer from poorer resolution than visible observations with the same size dish (or mirror) because

A telescope that suffers from chromatic aberration and has a low light-gathering power is most likely

Telescopes observing in the far ultraviolet can work from high-flying aircraft.

What is the frequency of the shortest wavelength light that can be detected by the average human eye?

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

The figure below shows a single lens with two rays of white light incident on it from the left. Sketch the paths of the blue, yellow, and red components of each of these rays to the point where the light from the upper and lower rays would meet.

CCD stands for a

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

A telescope that suffers from chromatic aberration and has a low light-gathering power is most likely

What is the wavelength of the shortest wavelength light visible to the human eye?

A wave on a lake is found to have a wavelength of 2 m and a frequency of 0.3 Hz. What is the speed of this wave?

The main reason for building large optical telescopes on Earth's surface is

Which has the larger light-gathering power?

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

The objective of most radio telescopes is similar to the objective of a reflecting optical telescope in that

What is the ratio of the light-gathering power of a 5-m telescope to that of a 0.5-m telescope?

A new generation of ground-based telescopes is currently being built that overcomes the limitations of the older large telescopes. Some of these new telescopes

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

A(n) ____________________ is used to measure the brightness and color of stars.

If the magnification of a telescope can be changed simply by exchanging eyepieces, why can't you just magnify objects to very large sizes by choosing an appropriate eyepiece?

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

Observations of radio waves from astronomical objects suffer from poorer resolution than visible observations with the same size dish (or mirror) because

A telescope that suffers from chromatic aberration and has a low light-gathering power is most likely

Telescopes observing in the far ultraviolet can work from high-flying aircraft.

What is the frequency of the shortest wavelength light that can be detected by the average human eye?

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

The figure below shows a single lens with two rays of white light incident on it from the left. Sketch the paths of the blue, yellow, and red components of each of these rays to the point where the light from the upper and lower rays would meet.

CCD stands for a

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

A telescope that suffers from chromatic aberration and has a low light-gathering power is most likely

What is the wavelength of the shortest wavelength light visible to the human eye?

A wave on a lake is found to have a wavelength of 2 m and a frequency of 0.3 Hz. What is the speed of this wave?

The main reason for building large optical telescopes on Earth's surface is

Which has the larger light-gathering power?

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

The objective of most radio telescopes is similar to the objective of a reflecting optical telescope in that

What is the ratio of the light-gathering power of a 5-m telescope to that of a 0.5-m telescope?

A new generation of ground-based telescopes is currently being built that overcomes the limitations of the older large telescopes. Some of these new telescopes

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