Question 1

Which of the following can be determined by using the Doppler Effect?
I. The speed at which a star is moving away from an observer.
II. The transverse velocity of a star.
III. The radial velocity of a star.
IV. The speed at which a car is traveling toward an observer.

Accepted Answer

A)   I, IV
B)   II III
C)   II IV
D)   I,III
E)   I, III, IV

Question 2

Blue stars are hotter than red stars.

Accepted Answer

A) True 
 B)False

Question 3

2 C)  Transition 3 D)  Transition 4 E)  Transition 5" class="answers-bank-image d-inline" rel="preload" > In the diagram, which of the transitions would absorb a photon with the greatest energy (shortest wavelength) ?

Accepted Answer

A)   Transition 1
B)   TransitioN2
C)   Transition 3
D)   Transition 4
E)   Transition 5

Question 4

What effect does solar activity have on Earth?

Accepted Answer

Solar activity, which includes phenomena...

Question 5

If you move an electron in an atom from a low energy level to a higher energy level within the atom, we say that the atom is

Accepted Answer

A)   in the ground state.
B)   ionized.
C)   dissociated.
D)   an excited atom.
E)   neutralized.

Question 6

A plot of the continuous spectra of five different stars is shown in the figure. Based on these spectra, which of the stars has the lowest temperature?

Accepted Answer

A)   Star A
B)   Star B
C)   Star C
D)   Star D
E)   Star E

Question 7

2 C)  Transition 3 D)  Transition 4 E)  Transition 5" class="answers-bank-image d-inline" rel="preload" > In the diagram, which of the transitions would absorb a photon with the smallest energy (longest wavelength) ?

Accepted Answer

A)   Transition 1
B)   TransitioN2
C)   Transition 3
D)   Transition 4
E)   Transition 5

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

At what wavelength would a star radiate the greatest amount of energy if the star has a surface temperature of 60,000 K?

Accepted Answer

A)   50 nm
B)   500 nm
C)   300 nm
D)   1.8*10 11 nm
E)   180 nm

Question 10

The ____________________ shows that sunspots are associated with magnetic activity.

Accepted Answer

The answer of The ____________________ shows that sunspots are associated...

Question 11

Astronomers can use ____ to measure magnetic fields on the sun.

Accepted Answer

A)   helioseismology
B)   perchloroethylene (C2Cl4) 
C)   neutrino detectors
D)   a magnetic carpet
E)   the Zeeman effect

Question 12

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 13

The diagram shows a plot of the temperature of the sun as a function of distance above the bottom of the photosphere. At what distance above the bottom of the photosphere does the temperature of the sun change the most rapidly with distance?

Accepted Answer

A)   1,000 km
B)   2,300 km
C)   2,500 km to 4,000 km
D)   400 km
E)   a and c

Question 14

How much energy is radiated each second by one square meter of a star whose temperature is 10,000 K? s in the Stefan-Boltzmann law is equal to 12J B)  5.67*108 J C)  5.67*104 J D)  300 nm E)  300,000,000 nm" class="answers-bank-image d-inline" rel="preload" > ,

Accepted Answer

A)   5.67*1012J
B)   5.67*108 J
C)   5.67*104 J
D)   300 nm
E)   300,000,000 nm

Question 15

Helioseismology is the study of the differential rotation and magnetic field of the sun.

Accepted Answer

A) True 
 B)False

Question 16

What is the Babcock model?

Accepted Answer

The answer of What is the Babcock model?...

Question 17

Sunspots often appear in pairs.

Accepted Answer

A) True 
 B)False

Question 18

If a star s spectrum does not contain spectral lines characteristic of a certain element, can we conclude that the star does not contain that element? Why or Why not?

Accepted Answer

The answer of If a star s spectrum does not...

Question 19

The gas motions within granules on the solar surface are

Accepted Answer

A)   upward in the centers of some cells and downward in others; the gas cools as it passes between individual granules.
B)   actually motionless. The dark regions are absorption features from gases in the photosphere.
C)   upward in the bright cell centers and downward around the darker edges.
D)   downward in the bright cell centers and upward around the darker edges.

Question 20

Why don t we see hydrogen Balmer lines in the spectra of stars with temperatures of 45,000 K?

Accepted Answer

A)   There is no hydrogen in stars this hot.
B)   The stars are hot enough that most of the hydrogen is ionized and the atoms can not absorb energy.
C)   These stars are so cool that nearly all of the electrons in the hydrogen atom are in the ground state.
D)   Stars of this temperature are too cool to produce an absorption spectrum.
E)   Stars of this temperature are too hot to produce an absorption spectrum.

Exam 5: Sun Light and Sun Atoms

A plot of the continuous spectra of five different stars is shown in the figure. Based on these spectra, which of the stars has the lowest temperature?

Correct AnswerverifiedShow Answer

What is the Babcock model?

Correct AnswerverifiedShow Answer

Helioseismology is the study of the differential rotation and magnetic field of the sun.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Sunspots often appear in pairs.

Correct AnswerverifiedShow Answer

The diagram shows a plot of the temperature of the sun as a function of distance above the bottom of the photosphere. At what distance above the bottom of the photosphere does the temperature of the sun change the most rapidly with distance?

Correct AnswerverifiedShow Answer

If you move an electron in an atom from a low energy level to a higher energy level within the atom, we say that the atom is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In the diagram, which of the transitions would absorb a photon with the smallest energy (longest wavelength) ?

Correct AnswerverifiedShow Answer

The gas motions within granules on the solar surface are

Correct AnswerverifiedShow Answer

Blue stars are hotter than red stars.

Correct AnswerverifiedShow Answer

In the diagram, which of the transitions would absorb a photon with the greatest energy (shortest wavelength) ?

Correct AnswerverifiedShow Answer

Why don t we see hydrogen Balmer lines in the spectra of stars with temperatures of 45,000 K?

Correct AnswerverifiedShow Answer

The ____________________ shows that sunspots are associated with magnetic activity.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

At what wavelength would a star radiate the greatest amount of energy if the star has a surface temperature of 60,000 K?

Correct AnswerverifiedShow Answer

If a star s spectrum does not contain spectral lines characteristic of a certain element, can we conclude that the star does not contain that element? Why or Why not?

Correct AnswerverifiedShow Answer

Astronomers can use ____ to measure magnetic fields on the sun.

Correct AnswerverifiedShow Answer

Which of the following can be determined by using the Doppler Effect? I. The speed at which a star is moving away from an observer. II. The transverse velocity of a star. III. The radial velocity of a star. IV. The speed at which a car is traveling toward an observer.

Correct AnswerverifiedShow Answer

What effect does solar activity have on Earth?

Correct AnswerAnswered by ExamLex AISolar activity, which includes phenomena...View AnswerShow Answer

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Answered by ExamLex AI
Solar activity, which includes phenomena...
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