Question 1

Stars that appear blue or white in color are than our yellow Sun.

Accepted Answer

The answer of Stars that appear blue or white in...

Question 2

An emission line results from an electron falling from a higher to lower energy orbital around its atomic nucleus.

Accepted Answer

A) True 
 B)False

Question 3

For hydrogen, the transition from the first to third excited state produces

Accepted Answer

A)   a blue green absorption line.
B)   an ultraviolet line.
C)   a red emission line.
D)   an infrared line.
E)   a violet emission line.F) D) and E)
G) A) and B)

Question 4

If we increased the pressure in a gas, how will its spectral lines be affected?

Accepted Answer

The lines will broad...

Question 5

Changing the electric field will have no effect on the magnetic fields of a body.

Accepted Answer

A) True 
 B)False

Question 6

As they move through space, the vibrating electrical and magnetic fields of a light wave must move perpendicular to each other.

Accepted Answer

A) True 
 B)False

Question 7

An FM station broadcasts at a frequency of 100 MHz. The wavelength of its carrier wave is
.

Accepted Answer

The answer of An FM station broadcasts at a frequency...

Question 8

You would perceive a change in a visible light wave's amplitude as a change in its color.

Accepted Answer

A) True 
 B)False

Question 9

If a fire truck's siren is rising in pitch, it must be approaching us.

Accepted Answer

A) True 
 B)False

Question 10

The Sun's observed spectrum is

Accepted Answer

A)   a continuum with absorption lines.
B)   only absorption lines on a black background.
C)   a continuum with no lines, as shown by the rainbow.
D)   a continuum with emission lines.
E)   only emission lines on a black background.F) B) and E)
G) B) and C)

Question 11

What do infrared and ultraviolet waves have in common? How do they differ?

Accepted Answer

Both are forms of electromagnetic radiat...

Question 12

According to Wein's law, the larger the blackbody, the shorter its peak wavelength.

Accepted Answer

A) True 
 B)False

Question 13

The common element discovered in the Sun's spectrum before it was found here is
.

Accepted Answer

The answer of The common element discovered in the Sun's...

Question 14

The element first found in the Sun's spectrum, then on Earth 30 years later, is

Accepted Answer

A)   technicum.
B)   hydrogen.
C)   helium.
D)   aluminum.
E)   solarium.F) B) and C)
G) C) and D)

Question 15

The radiation our eyes are most sensitive to is the color

Accepted Answer

A)   black at 227 nm.
B)   violet at 7,000 Angstroms.
C)   red at 6563 Angstroms.
D)   yellow- green at about 550 nm.
E)   blue at 4,321 nm.F) A) and B)
G) B) and C)

Question 16

How can the Doppler effect be used to determine if a storm is forming into a tornado?

Accepted Answer

Radar can determine the distance to a st...

Question 17

In a hydrogen atom, a transition from the 2nd to the 1st excited state will produce

Accepted Answer

A)   the bright red Balmer alpha emission line.
B)   three different emission lines.
C)   a dark absorption line.
D)   an ultraviolet spectral line.
E)   no emission line.F) D) and E)
G) A) and E)

Question 18

Explain how the Doppler effect has been used to detect invisible planets orbiting other Sun- like stars.

Accepted Answer

The planets are massive enough to pull t...

Question 19

The shorter a wave's wavelength, the greater its energy.

Accepted Answer

A) True 
 B)False

Question 20

A binary star system is one with two stars orbiting each other. How can the Doppler effect be used to find binary stars whose orbital plane is along our line of sight and determine their periods?

Accepted Answer

As the two stars orbit each other rapidl...

Exam 3: Light and Matter: the Inner Workings of the Cosmos

Changing the electric field will have no effect on the magnetic fields of a body.

Correct AnswerverifiedShow Answer

How can the Doppler effect be used to determine if a storm is forming into a tornado?

Correct AnswerverifiedRadar can determine the distance to a st...View AnswerShow Answer

The common element discovered in the Sun's spectrum before it was found here is .

Correct AnswerverifiedShow Answer

The radiation our eyes are most sensitive to is the color

Correct AnswerverifiedShow Answer

An FM station broadcasts at a frequency of 100 MHz. The wavelength of its carrier wave is .

Correct AnswerverifiedShow Answer

Stars that appear blue or white in color are than our yellow Sun.

Correct AnswerverifiedShow Answer

An emission line results from an electron falling from a higher to lower energy orbital around its atomic nucleus.

Correct AnswerverifiedShow Answer

The element first found in the Sun's spectrum, then on Earth 30 years later, is

Correct AnswerverifiedShow Answer

For hydrogen, the transition from the first to third excited state produces

Correct AnswerverifiedShow Answer

The Sun's observed spectrum is

Correct AnswerverifiedShow Answer

Explain how the Doppler effect has been used to detect invisible planets orbiting other Sun- like stars.

Correct AnswerverifiedThe planets are massive enough to pull t...View AnswerShow Answer

In a hydrogen atom, a transition from the 2nd to the 1st excited state will produce

Correct AnswerverifiedShow Answer

According to Wein's law, the larger the blackbody, the shorter its peak wavelength.

Correct AnswerverifiedShow Answer

If a fire truck's siren is rising in pitch, it must be approaching us.

Correct AnswerverifiedShow Answer

As they move through space, the vibrating electrical and magnetic fields of a light wave must move perpendicular to each other.

Correct AnswerverifiedShow Answer

You would perceive a change in a visible light wave's amplitude as a change in its color.

Correct AnswerverifiedShow Answer

A binary star system is one with two stars orbiting each other. How can the Doppler effect be used to find binary stars whose orbital plane is along our line of sight and determine their periods?

Correct AnswerverifiedAs the two stars orbit each other rapidl...View AnswerShow Answer

If we increased the pressure in a gas, how will its spectral lines be affected?

Correct AnswerverifiedThe lines will broad...View AnswerShow Answer

The shorter a wave's wavelength, the greater its energy.

Correct AnswerverifiedShow Answer

What do infrared and ultraviolet waves have in common? How do they differ?

Correct AnswerverifiedBoth are forms of electromagnetic radiat...View AnswerShow Answer

Correct Answer
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Radar can determine the distance to a st...
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Correct Answer
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The planets are massive enough to pull t...
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
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As the two stars orbit each other rapidl...
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Correct Answer
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The lines will broad...
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Correct Answer
verified

Correct Answer
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Both are forms of electromagnetic radiat...
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