Question 1

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 2

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 other choices are correct. 
A)  an optical telescope 
B)  the VLBA telescope 
C)  an X-ray telescope 
D)  a radio telescope 
E)  None of the other choices are correct.

Question 3

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

Accepted Answer

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

Question 4

Heat involves wavelengths that are in the ____________ band of the electromagnetic spectrum.

Accepted Answer

The answer of Heat involves wavelengths that are in the...

Question 5

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 6

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

Accepted Answer

​ Photographic plates can detect faint o

Question 7

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

Accepted Answer

A)  10 to 1 
B)  1 to 10 
C)  100 to 1 
D)  1 to 100 
E)  3.2 to 1 
A)  10 to 1 
B)  1 to 10 
C)  100 to 1 
D)  1 to 100 
E)  3.2 to 1

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

Adaptive optics measures and cancels out all seeing distortions that are caused by turbulence in Earth's atmosphere.

Accepted Answer

A) True 
 B)False

Question 11

A nanometer is

Accepted Answer

A)  a unit of frequency. 
B)  a unit of energy. 
C)  a unit of mass. 
D)  a unit of length. 
E)  a unit of resolving power. 
A)  a unit of frequency. 
B)  a unit of energy. 
C)  a unit of mass. 
D)  a unit of length. 
E)  a unit of resolving power.

Question 12

_________________ absorbs most infrared and microwaves coming from outside Earth's atmosphere.

Accepted Answer

The answer of _________________ absorbs most infrared and microwaves coming...

Question 13

300-nm light has a lower frequency than 500-nm light.

Accepted Answer

A) True 
 B)False

Question 14

A __________ is a piece of glass with many small parallel lines etched on its surface to produce a spectrum.

Accepted Answer

A)  grating 
B)  spectrograph 
C)  photometer 
D)  charge-coupled device 
E)  prism 
A)  grating 
B)  spectrograph 
C)  photometer 
D)  charge-coupled device 
E)  prism

Question 15

As shown, the single lens splits the light according to wavelength, a condition known as _______.

Accepted Answer

A)  achromatic aberration 
B)  blurring aberration 
C)  chromatic aberration 
D)  seeing 
A)  achromatic aberration 
B)  blurring aberration 
C)  chromatic aberration 
D)  seeing

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

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 18

Astronomers build optical telescopes on tops of mountains because

Accepted Answer

A)  there is less air to dim the light. 
B)  the seeing is better. 
C)  CCDs work better with a beautiful mountain view. 
D)  All of the choices are correct. 
E)  there is less air to dim the light and the seeing is better. 
A)  there is less air to dim the light. 
B)  the seeing is better. 
C)  CCDs work better with a beautiful mountain view. 
D)  All of the choices are correct. 
E)  there is less air to dim the light and the seeing is better.

Question 19

Telescopes in space do not have the 'seeing' issues of ground-based telescopes.

Accepted Answer

A) True 
 B)False

Question 20

The highest frequency and highest energy band of the electromagnetic spectrum is the ___________________ band.

Accepted Answer

The answer of The highest frequency and highest energy band...

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

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

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

Heat involves wavelengths that are in the ____________ band of the electromagnetic spectrum.

The Very Long Baseline Array (VLBA)

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

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

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

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

Adaptive optics measures and cancels out all seeing distortions that are caused by turbulence in Earth's atmosphere.

A nanometer is

_________________ absorbs most infrared and microwaves coming from outside Earth's atmosphere.

300-nm light has a lower frequency than 500-nm light.

A __________ is a piece of glass with many small parallel lines etched on its surface to produce a spectrum.

As shown, the single lens splits the light according to wavelength, a condition known as _______.

Which has the larger light-gathering power?

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

Astronomers build optical telescopes on tops of mountains because

Telescopes in space do not have the 'seeing' issues of ground-based telescopes.

The highest frequency and highest energy band of the electromagnetic spectrum is the ___________________ band.

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

Origin of the Solar System and Extrasolar Planets

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

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

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

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

Heat involves wavelengths that are in the ____________ band of the electromagnetic spectrum.

The Very Long Baseline Array (VLBA)

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

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

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

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

Adaptive optics measures and cancels out all seeing distortions that are caused by turbulence in Earth's atmosphere.

A nanometer is

_________________ absorbs most infrared and microwaves coming from outside Earth's atmosphere.

300-nm light has a lower frequency than 500-nm light.

A __________ is a piece of glass with many small parallel lines etched on its surface to produce a spectrum.

As shown, the single lens splits the light according to wavelength, a condition known as _______.

Which has the larger light-gathering power?

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

Astronomers build optical telescopes on tops of mountains because

Telescopes in space do not have the 'seeing' issues of ground-based telescopes.

The highest frequency and highest energy band of the electromagnetic spectrum is the ___________________ band.

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

Origin of the Solar System and Extrasolar Planets

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