Question 1

The Doppler effect is sensitive only to motion along the line of sight.

Accepted Answer

A) True 
 B)False

Question 2

An atom that is excited

Accepted Answer

A)  is also ionized.
B)  is an isotope.
C)  has had its electron moved to the lowest energy level.
D)  can emit a photon when the electron moves to a lower energy level.
E)  can emit a photon when the electron moves to a higher energy level.

Question 3

If the change in wavelength is less than zero, then the radial velocity tells you that the star is moving _______________ you.

Accepted Answer

A)  parallel to
B)  away from
C)  towards
D)  in circles around

Question 4

How much energy is radiated each second by one square meter of a star whose temperature is 10,000 K Note: σ in the Stefan-Boltzmann law is equal to .

Accepted Answer

A)   5.67×10125.67 × 10^{12}5.67×1012  J
B)   5.67×1085.67 × 10^85.67×108  J
C)   5.67×1045.67 × 10^45.67×104  J
D)  300 nm
E)  300,000,000 nm

Question 5

An atom can be excited

Accepted Answer

A)  if it emits a photon.
B)  if it collides with another atom or electron.
C)  if it absorbs a photon.
D)  if it emits a photon or if it collides with another atom or electron.
E)  if it collides with another atom or electron or if it absorbs a photon.

Question 6

To create the above spectra, which of the following is NOT true

Accepted Answer

A)  Light from a blackbody passed though a cool, low-density gas.
B)  Light from a continuous spectrum passed through a cool, low-density gas.
C)  Light from a hot, dense gas produced light at all wavelengths.
D)  All of the other choices are not true.

Question 7

If continuous spectrum light from a star passes through a cool, low-density gas on its way to your telescope and spectroscope, ____ spectrum on the continuous spectrum results.

Accepted Answer

A)  a dark (absorption)  line
B)  a bright (emission)  line
C)  continuous

Question 8

The figure shows a color image of Betelgeuse, a red giant star. Which of the surface temperatures below best matches Betelgeuse's surface temperature Hint: Our Sun at 6000 K is yellow.

Accepted Answer

A)  64,000 K
B)  32,000 K
C)  16,000 K
D)  8000 K
E)  2000 K

Question 9

Which of the following cannot be determined from the spectrum of a star

Accepted Answer

A)  chemical composition
B)  surface temperature
C)  radial (along line of sight)  velocity
D)  tangential (perpendicular to line of sight)  velocity
E)  radial (along line of sight)  Velocity

Question 10

When an electron transitions from a higher orbital level to a lower orbital level, a photon is ______.

Accepted Answer

A)  absorbed
B)  transitioned to somewhere else in that same orbit
C)  emitted
D)  None of the other choices are correct as a photon is not a product of or source to the transition.

Question 11

The lowest energy level in an atom is

Accepted Answer

A)  the absolute zero temperature.
B)  the ground state.
C)  the ionization level.
D)  responsible for Doppler shifts.
E)  the energy level from which the Paschen series of hydrogen originates.

Question 12

If temperature refers to the intensity of agitation then absolute zero is no agitation.

Accepted Answer

A) True 
 B)False

Question 13

-In the above model of an atom, where would the proton be located

Accepted Answer

A)  A
B)  1
C)  2
D)  3

Question 14

Two white dwarf stars are the same size, but one has a surface temperature twice as hot as the other. The hotter star will radiate

Accepted Answer

A)  half as much energy per second as the cooler star.
B)  the same amount of energy per second as the cooler star.
C)  four times as much energy per second as the cooler star.
D)  sixteen times as much energy per second as the cooler star.

Question 15

A blackbody emits a continuous spectrum.

Accepted Answer

A) True 
 B)False

Question 16

Electrons in an atom are attracted to the nucleus by the _______________ force.

Accepted Answer

The answer of Electrons in an atom are attracted to...

Question 17

Why should photons emitted by a hotter gas have, on average, shorter wavelengths than photons emitted by a cooler gas

Accepted Answer

The wavelength of photons emit...

Question 18

The ____ is responsible for binding the electrons to the nucleus.

Accepted Answer

A)  Kirchhoff's law
B)  ground state
C)  temperature
D)  Coulomb force
E)  Balmer series

Question 19

-In the above  model of an atom, if you were to draw an electron's transition from the second excited state to the third excited state, what numbers would this correspond from/to What kind of spectrum would be produced

Accepted Answer

A)  3 to 4, absorption
B)  2 to 3, absorption
C)  3 to 4, emission
D)  2 to 3, emission

Question 20

The number of ____ in the nucleus determines what element the nucleus is.

Accepted Answer

A)  protons
B)  electrons
C)  neutrons
D)  None of these determines the element.
E)  All of these determine the element.

Exam 6: Atoms and Spectra

Electrons in an atom are attracted to the nucleus by the _______________ force.

Correct Answer
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Correct Answer
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To create the above spectra, which of the following is NOT true

Correct Answer
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If temperature refers to the intensity of agitation then absolute zero is no agitation.

Correct Answer
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If continuous spectrum light from a star passes through a cool, low-density gas on its way to your telescope and spectroscope, ____ spectrum on the continuous spectrum results.

Correct Answer
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Why should photons emitted by a hotter gas have, on average, shorter wavelengths than photons emitted by a cooler gas

Correct Answer
verified
The wavelength of photons emit...
View Answer

Which of the following cannot be determined from the spectrum of a star

Correct Answer
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The ____ is responsible for binding the electrons to the nucleus.

Correct Answer
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The lowest energy level in an atom is

Correct Answer
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When an electron transitions from a higher orbital level to a lower orbital level, a photon is ______.

Correct Answer
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Two white dwarf stars are the same size, but one has a surface temperature twice as hot as the other. The hotter star will radiate

Correct Answer
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An atom that is excited

Correct Answer
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The figure shows a color image of Betelgeuse, a red giant star. Which of the surface temperatures below best matches Betelgeuse's surface temperature Hint: Our Sun at 6000 K is yellow.

Correct Answer
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An atom can be excited

Correct Answer
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If the change in wavelength is less than zero, then the radial velocity tells you that the star is moving _______________ you.

Correct Answer
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The number of ____ in the nucleus determines what element the nucleus is.

Correct Answer
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A blackbody emits a continuous spectrum.

Correct Answer
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-In the above model of an atom, where would the proton be located

Correct Answer
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-In the above model of an atom, if you were to draw an electron's transition from the second excited state to the third excited state, what numbers would this correspond from/to What kind of spectrum would be produced

Correct Answer
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The Doppler effect is sensitive only to motion along the line of sight.

Correct Answer
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Exam 6: Atoms and Spectra

Electrons in an atom are attracted to the nucleus by the _______________ force.

Correct AnswerverifiedShow Answer

How much energy is radiated each second by one square meter of a star whose temperature is 10,000 K Note: σ in the Stefan-Boltzmann law is equal to .

Correct AnswerverifiedShow Answer

To create the above spectra, which of the following is NOT true

Correct AnswerverifiedShow Answer

If temperature refers to the intensity of agitation then absolute zero is no agitation.

Correct AnswerverifiedShow Answer

If continuous spectrum light from a star passes through a cool, low-density gas on its way to your telescope and spectroscope, ____ spectrum on the continuous spectrum results.

Correct AnswerverifiedShow Answer

Why should photons emitted by a hotter gas have, on average, shorter wavelengths than photons emitted by a cooler gas

Correct AnswerverifiedThe wavelength of photons emit...View AnswerShow Answer

Which of the following cannot be determined from the spectrum of a star

Correct AnswerverifiedShow Answer

The ____ is responsible for binding the electrons to the nucleus.

Correct AnswerverifiedShow Answer

The lowest energy level in an atom is

Correct AnswerverifiedShow Answer

When an electron transitions from a higher orbital level to a lower orbital level, a photon is ______.

Correct AnswerverifiedShow Answer

Two white dwarf stars are the same size, but one has a surface temperature twice as hot as the other. The hotter star will radiate

Correct AnswerverifiedShow Answer

An atom that is excited

Correct AnswerverifiedShow Answer

The figure shows a color image of Betelgeuse, a red giant star. Which of the surface temperatures below best matches Betelgeuse's surface temperature Hint: Our Sun at 6000 K is yellow.

Correct AnswerverifiedShow Answer

An atom can be excited

Correct AnswerverifiedShow Answer

If the change in wavelength is less than zero, then the radial velocity tells you that the star is moving _______________ you.

Correct AnswerverifiedShow Answer

The number of ____ in the nucleus determines what element the nucleus is.

Correct AnswerverifiedShow Answer

A blackbody emits a continuous spectrum.

Correct AnswerverifiedShow Answer

-In the above model of an atom, where would the proton be located

Correct AnswerverifiedShow Answer

-In the above model of an atom, if you were to draw an electron's transition from the second excited state to the third excited state, what numbers would this correspond from/to What kind of spectrum would be produced

Correct AnswerverifiedShow Answer

The Doppler effect is sensitive only to motion along the line of sight.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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The wavelength of photons emit...
View Answer

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