Question 1

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 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. 
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

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 
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 4

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. 
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 5

A blackbody emits a continuous spectrum.

Accepted Answer

A) True 
 B)False

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

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

Question 9

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) $5.67 × 10^{12}$ J 
B) $5.67 × 10^8$ J 
C) $5.67 × 10^4$ J 
D) 300 nm 
E) 300,000,000 nm 
A) $5.67 × 10^{12}$ J 
B) $5.67 × 10^8$ J 
C) $5.67 × 10^4$ J 
D) 300 nm 
E) 300,000,000 nm

Question 10

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. 
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 11

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. 
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 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

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

Accepted Answer

A) True 
 B)False

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. 
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

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

Question 16

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 17

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 18

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

Accepted Answer

A) True 
 B)False

Question 19

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 20

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

Accepted Answer

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

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

An atom that is excited

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

An atom can be excited

A blackbody emits a continuous spectrum.

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

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

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.

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 .

The lowest energy level in an atom is

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

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.

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

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

-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

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

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

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

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

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

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

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

An atom that is excited

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

An atom can be excited

A blackbody emits a continuous spectrum.

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

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

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.

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 .

The lowest energy level in an atom is

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

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.

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

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

-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

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

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

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

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

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

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