Question 1

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 2

Describe two ways in which an atom can be excited.

Accepted Answer

The answer of Describe two ways in which an atom...

Question 3

Isotopes of the same element have the same number of protons.

Accepted Answer

A) True 
 B)False

Question 4

The peak wavelength in the continuous emission spectrum of a body is inversely proportional to its ____________________.

Accepted Answer

The answer of The peak wavelength in the continuous emission...

Question 5

Blue stars emit most of their energy at shorter wavelengths than red stars..

Accepted Answer

A) True 
 B)False

Question 6

One star has a temperature of 30,000 K and another star has a temperature of 6,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface?

Accepted Answer

A)  5 times 
B)  25 times 
C)  8.1*1017 times 
D)  625 times 
E)  1.3*1015 times 
A)  5 times 
B)  25 times 
C)  8.1*1017 times 
D)  625 times 
E)  1.3*1015 times

Question 7

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

Accepted Answer

a line fro

Question 8

One star has a temperature of 10,000 K and another star has a temperature of 5,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface?

Accepted Answer

A)  16 times 
B)  2 times 
C)  1*1016 times 
D)  625 times 
E)  25 times 
A)  16 times 
B)  2 times 
C)  1*1016 times 
D)  625 times 
E)  25 times

Question 9

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

Question 10

Describe how an atom in the atmosphere of the sun can be excited.

Accepted Answer

An atom in the atmosphere of the sun can

Question 11

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*1011 nm 
E)  180 nm 
A)  50 nm 
B)  500 nm 
C)  300 nm 
D)  1.8*1011 nm 
E)  180 nm

Question 12

The hotter an object, the more blue it appears.

Accepted Answer

A) True 
 B)False

Question 13

Hydrogen lines are weak in the spectra of hot stars because many of the hydrogen atoms are ionized.

Accepted Answer

A) True 
 B)False

Question 14

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

Question 15

An atom can be ionized by ____ it.

Accepted Answer

A)  removing electrons from 
B)  adding an electron to 
C)  removing a proton from 
D)  Either answer a or b 
A)  removing electrons from 
B)  adding an electron to 
C)  removing a proton from 
D)  Either answer a or b

Question 16

What would the spectrum of hydrogen look like if we could see into the ultraviolet?

Accepted Answer

The answer of What would the spectrum of hydrogen look...

Question 17

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. 
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 18

The wavelength of the hydrogen line from level 1 to level 2 in a hot star is ____________ the wavelength of the same line in a cool star. The stars have the same radial velocities away from Earth.

Accepted Answer

A)  larger than. 
B)  the same as 
C)  smaller than 
D)  not enough information to answer 
A)  larger than. 
B)  the same as 
C)  smaller than 
D)  not enough information to answer

Question 19

The nucleus is made of ____

Accepted Answer

A)  electrons only. 
B)  protons only. 
C)  neutrons only. 
D)  a and b, usually. 
E)  b and c, usually. 
A)  electrons only. 
B)  protons only. 
C)  neutrons only. 
D)  a and b, usually. 
E)  b and c, usually.

Question 20

You are standing near a railroad track and a train is moving toward you at 60 mph and blowing its horn. What will you notice as the train moves past you?

Accepted Answer

A)  As the train approaches, the horn will sound lower in pitch than when the train is moving away. 
B)  As the train approaches, the horn will sound higher in pitch than when the train is moving away. 
C)  There will be no change in the pitch of the horn as it moves by. 
D)  The horn will get louder as the train moves away from you. 
E)  The horn will get quieter as the train moves toward you. 
A)  As the train approaches, the horn will sound lower in pitch than when the train is moving away. 
B)  As the train approaches, the horn will sound higher in pitch than when the train is moving away. 
C)  There will be no change in the pitch of the horn as it moves by. 
D)  The horn will get louder as the train moves away from you. 
E)  The horn will get quieter as the train moves toward you.

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?

Describe two ways in which an atom can be excited.

Isotopes of the same element have the same number of protons.

The peak wavelength in the continuous emission spectrum of a body is inversely proportional to its ____________________.

Blue stars emit most of their energy at shorter wavelengths than red stars..

One star has a temperature of 30,000 K and another star has a temperature of 6,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface?

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

One star has a temperature of 10,000 K and another star has a temperature of 5,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface?

An atom can be excited

Describe how an atom in the atmosphere of the sun can be excited.

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

The hotter an object, the more blue it appears.

Hydrogen lines are weak in the spectra of hot stars because many of the hydrogen atoms are ionized.

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

An atom can be ionized by ____ it.

What would the spectrum of hydrogen look like if we could see into the ultraviolet?

An atom that is excited

The wavelength of the hydrogen line from level 1 to level 2 in a hot star is ____________ the wavelength of the same line in a cool star. The stars have the same radial velocities away from Earth.

The nucleus is made of ____

You are standing near a railroad track and a train is moving toward you at 60 mph and blowing its horn. What will you notice as the train moves past you?

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

The Origin of the Solar System

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

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?

Describe two ways in which an atom can be excited.

Isotopes of the same element have the same number of protons.

The peak wavelength in the continuous emission spectrum of a body is inversely proportional to its ____________________.

Blue stars emit most of their energy at shorter wavelengths than red stars..

One star has a temperature of 30,000 K and another star has a temperature of 6,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface?

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

One star has a temperature of 10,000 K and another star has a temperature of 5,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface?

An atom can be excited

Describe how an atom in the atmosphere of the sun can be excited.

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

The hotter an object, the more blue it appears.

Hydrogen lines are weak in the spectra of hot stars because many of the hydrogen atoms are ionized.

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

An atom can be ionized by ____ it.

What would the spectrum of hydrogen look like if we could see into the ultraviolet?

An atom that is excited

The wavelength of the hydrogen line from level 1 to level 2 in a hot star is ____________ the wavelength of the same line in a cool star. The stars have the same radial velocities away from Earth.

The nucleus is made of ____

You are standing near a railroad track and a train is moving toward you at 60 mph and blowing its horn. What will you notice as the train moves past you?

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

The Origin of the Solar System

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