Question 1

An atom gained an electron. Therefore, it has been ionized.

Accepted Answer

A) True 
 B)False

Question 2

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

Question 3

The process of removing an electron from a stable nucleus is known as

Accepted Answer

A)  ionization. 
B)  Doppler broadening. 
C)  collisional broadening. 
D)  a red shift. 
E)  quantum mechanics. 
A)  ionization. 
B)  Doppler broadening. 
C)  collisional broadening. 
D)  a red shift. 
E)  quantum mechanics.

Question 4

An atom that has lost an electron is called an ion.

Accepted Answer

A) True 
 B)False

Question 5

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. 
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 6

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

Question 7

A blackbody's emission as observed through a low-density gas will produce a ____________________ spectrum.

Accepted Answer

absorption

Question 8

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

Question 9

What is the order of star colors with increasing temperature?

Accepted Answer

A)  red, yellow, blue 
B)  blue, red, yellow 
C)  red, blue, yellow 
D)  yellow, red, blue 
E)  blue, yellow, red 
A)  red, yellow, blue 
B)  blue, red, yellow 
C)  red, blue, yellow 
D)  yellow, red, blue 
E)  blue, yellow, red

Question 10

Diagram 6-1  
In Diagram 6-1, which of the transitions would absorb a photon with the greatest energy?

Accepted Answer

A)  Transition 1 
B)  Transition 2 
C)  Transition 3 
D)  Transition 4 
E)  Transition 5 
A)  Transition 1 
B)  Transition 2 
C)  Transition 3 
D)  Transition 4 
E)  Transition 5

Question 11

In the above model of an atom, draw a transition from the ground state to the first excited state. To draw this, draw the electron's motion as a line with an arrow to indicate direction and draw the photon as a wave with an arrow to indicated direction. Label the electron and photon. Label whether this is an absorption, emission, or continuous spectrum.

Accepted Answer

The answer of   
In the above model of...

Question 12

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

Question 13

What is a blackbody?

Accepted Answer

A)  a perfect emitter and a perfect absorber of light 
B)  a perfectly opaque object 
C)  a dense object having a temperature above absolute zero 
D)  All of the other choices are correct. 
A)  a perfect emitter and a perfect absorber of light 
B)  a perfectly opaque object 
C)  a dense object having a temperature above absolute zero 
D)  All of the other choices are correct.

Question 14

The hotter an object, the bluer it appears.

Accepted Answer

A) True 
 B)False

Question 15

At what wavelength would a star radiate the greatest amount of energy if the star has a surface temperature of 10,000 K?

Accepted Answer

A)  10 nm 
B)  100 nm 
C)  300 nm 
D)  1.0 × 104 nm 
E)  3.0 × 1010 nm 
A)  10 nm 
B)  100 nm 
C)  300 nm 
D)  1.0 × 104 nm 
E)  3.0 × 1010 nm

Question 16

Figure 6-1  
A plot of the continuous spectra of five different stars is shown in Figure 6-1. Based on these spectra, which of the stars is the hottest?

Accepted Answer

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

Question 17

A ____________ will be obtained from an observed star's spectrum that has been shifted towards shorter wavelengths as the star is moving ________ us.

Accepted Answer

The answer of A ____________ will be obtained from an...

Question 18

In the diagram below, draw the transition that would emit a photon with the shortest wavelength.

Accepted Answer

a line fro

Question 19

You would like to know the chemical composition of a star's atmosphere. Therefore you will need to obtain the star's ______________ spectra.

Accepted Answer

emission,o

Question 20

Which property does color best represent?

Accepted Answer

A)  velocity 
B)  thermal energy 
C)  temperature 
D)  heat 
A)  velocity 
B)  thermal energy 
C)  temperature 
D)  heat

An atom gained an electron. Therefore, it has been ionized.

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

The process of removing an electron from a stable nucleus is known as

An atom that has lost an electron is called an ion.

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

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

A blackbody's emission as observed through a low-density gas will produce a ____________________ spectrum.

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

What is the order of star colors with increasing temperature?

Diagram 6-1 In Diagram 6-1, which of the transitions would absorb a photon with the greatest energy?

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.

What is a blackbody?

The hotter an object, the bluer it appears.

At what wavelength would a star radiate the greatest amount of energy if the star has a surface temperature of 10,000 K?

Figure 6-1 A plot of the continuous spectra of five different stars is shown in Figure 6-1. Based on these spectra, which of the stars is the hottest?

A ____ will be obtained from an observed star's spectrum that has been shifted towards shorter wavelengths as the star is moving us.

In the diagram below, draw the transition that would emit a photon with the shortest wavelength.

You would like to know the chemical composition of a star's atmosphere. Therefore you will need to obtain the star's ______________ spectra.

Which property does color best represent?

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

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 6: Atoms and Spectra

An atom gained an electron. Therefore, it has been ionized.

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

The process of removing an electron from a stable nucleus is known as

An atom that has lost an electron is called an ion.

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

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

A blackbody's emission as observed through a low-density gas will produce a ____________________ spectrum.

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

What is the order of star colors with increasing temperature?

Diagram 6-1 In Diagram 6-1, which of the transitions would absorb a photon with the greatest energy?

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.

What is a blackbody?

The hotter an object, the bluer it appears.

At what wavelength would a star radiate the greatest amount of energy if the star has a surface temperature of 10,000 K?

Figure 6-1 A plot of the continuous spectra of five different stars is shown in Figure 6-1. Based on these spectra, which of the stars is the hottest?

A ____________ will be obtained from an observed star's spectrum that has been shifted towards shorter wavelengths as the star is moving ________ us.

In the diagram below, draw the transition that would emit a photon with the shortest wavelength.

You would like to know the chemical composition of a star's atmosphere. Therefore you will need to obtain the star's ______________ spectra.

Which property does color best represent?

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

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

A ____ will be obtained from an observed star's spectrum that has been shifted towards shorter wavelengths as the star is moving us.