Question 1

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

Accepted Answer

A)   hydrogen.
B)   helium.
C)   solarium.
D)   technetium.
E)   aluminum.F) All of the above
G) C) and D)

Question 2

A low density gas must be hot in order to produce an absorption line.

Accepted Answer

A) True 
 B)False

Question 3

Because the changes in energy levels happen in discrete steps,we refer to these as ________ leaps.

Accepted Answer

The answer of Because the changes in energy levels happen...

Question 4

What information about an astronomical object can be determined by observing its spectrum?

Accepted Answer

A)   its temperature
B)   its radial motion
C)   its chemical composition
D)   whether it has a strong magnetic field
E)   All of the aboveF) B) and E)
G) C) and E)

Question 5

The spectral lines of each element are distinctive to that element,whether we are looking at emission or absorption lines.

Accepted Answer

A) True 
 B)False

Question 6

An emission spectrum can be used to identify a(n) :

Accepted Answer

A)   proton.
B)   electron.
C)   neutron.
D)   atom.
E)   neutrino.F) C) and D)
G) A) and B)

Question 7

Define absorption lines.

Accepted Answer

When light from a continuous source,such...

Question 8

Which of these is the classic continuous spectrum?

Accepted Answer

A)   sunlight
B)   a rainbow
C)   a neon light
D)   a fluorescent light
E)   a glowing nebula, such as M-42F) A) and E)
G) C) and D)

Question 9

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

Accepted Answer

The lines will broad...

Question 10

All wavelengths of light travel at the same speed in a vacuum,and carry the same energy per photon.

Accepted Answer

A) True 
 B)False

Question 11

Why is spectroscopy important to astronomers?

Accepted Answer

Virtually all the information we receive...

Question 12

According to the Zeeman effect,the splitting of a sunspot's spectral lines is due to:

Accepted Answer

A)   their rapid rotation.
B)   temperature variations.
C)   their magnetic fields.
D)   their radial velocity.
E)   a Doppler shift.F) B) and E)
G) B) and C) C

Question 13

All Lyman emission lines are transitions from the excited state to ________ state.

Accepted Answer

ground

Question 14

A hydrogen atom consists of an electron and a(n) :

Accepted Answer

A)   proton.
B)   ion.
C)   neutrino.
D)   neutron.
E)   lepton.F) All of the above
G) A) and B)

Question 15

The longer the wavelength of the photon,the ________ the energy it carries.

Accepted Answer

The answer of The longer the wavelength of the photon,the...

Question 16

How many blue photons (frequency of 6.50 × 10¹⁴ hz)per second would be required to carry 1 Watt (1 Watt = 1 Joule per second)of energy?

Accepted Answer

Using E = hf and h = 6.63 × 10...

Question 17

The colors of a neon light arise because it is a(n)________ spectrum.

Accepted Answer

emission (or bright line)

Question 18

The three laws dealing with the creation of various spectra are due to:

Accepted Answer

A)   Newton.
B)   Fraunhofer.
C)   Kirchhoff.
D)   Bohr.
E)   Einstein.F) B) and E)
G) A) and E)

Question 19

The radial velocity of a star's motion in space can also broaden its spectral lines.

Accepted Answer

A) True 
 B)False

Question 20

A heavy neutral atom,such as iron,produces many spectral lines compared to light elements like hydrogen and helium.Why?

Accepted Answer

A)   Because of the larger number of electrons and corresponding energy levels, more transitions are possible.
B)   Because of the larger number of electrons, there are many ionization levels possible.
C)   Because of the larger number protons, the amount of force holding the electrons to the atom can vary between different iron atoms.
D)   Because of the atom's larger size, it will be hit by more photons in a beam of light.E) C) and D)
F) None of the above

Exam 4: Spectroscopy: The Inner Workings of Atoms

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

Correct AnswerverifiedShow Answer

A low density gas must be hot in order to produce an absorption line.

Correct AnswerverifiedShow Answer

Because the changes in energy levels happen in discrete steps,we refer to these as ________ leaps.

Correct AnswerverifiedShow Answer

What information about an astronomical object can be determined by observing its spectrum?

Correct AnswerverifiedShow Answer

The spectral lines of each element are distinctive to that element,whether we are looking at emission or absorption lines.

Correct AnswerverifiedShow Answer

An emission spectrum can be used to identify a(n) :

Correct AnswerverifiedShow Answer

Define absorption lines.

Correct AnswerverifiedWhen light from a continuous source,such...View AnswerShow Answer

Which of these is the classic continuous spectrum?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedThe lines will broad...View AnswerShow Answer

All wavelengths of light travel at the same speed in a vacuum,and carry the same energy per photon.

Correct AnswerverifiedShow Answer

Why is spectroscopy important to astronomers?

Correct AnswerverifiedVirtually all the information we receive...View AnswerShow Answer

According to the Zeeman effect,the splitting of a sunspot's spectral lines is due to:

Correct AnswerverifiedC

All Lyman emission lines are transitions from the excited state to ________ state.

Correct Answerverifiedground

A hydrogen atom consists of an electron and a(n) :

Correct AnswerverifiedShow Answer

The longer the wavelength of the photon,the ________ the energy it carries.

Correct AnswerverifiedShow Answer

How many blue photons (frequency of 6.50 × 10¹⁴ hz)per second would be required to carry 1 Watt (1 Watt = 1 Joule per second)of energy?

Correct AnswerverifiedUsing E = hf and h = 6.63 × 10...View AnswerShow Answer

The colors of a neon light arise because it is a(n)________ spectrum.

Correct Answerverifiedemission (or bright line)

The three laws dealing with the creation of various spectra are due to:

Correct AnswerverifiedShow Answer

The radial velocity of a star's motion in space can also broaden its spectral lines.

Correct AnswerverifiedShow Answer

A heavy neutral atom,such as iron,produces many spectral lines compared to light elements like hydrogen and helium.Why?

Correct AnswerverifiedShow Answer

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When light from a continuous source,such...
View Answer

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The lines will broad...
View Answer

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Virtually all the information we receive...
View Answer

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C

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ground

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Using E = hf and h = 6.63 × 10...
View Answer

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emission (or bright line)

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