Question 1

A continuous spectrum is produced by ____.

Accepted Answer

A)  atoms that become ionized 
B)  electrons that transfer from a high energy level to a low energy level 
C)  electrons that transfer from a low energy level to a high energy level 
D)  the intensity of agitation of atoms in a hot gas 
E)  the motion of an object toward or away from the observer 
A)  atoms that become ionized 
B)  electrons that transfer from a high energy level to a low energy level 
C)  electrons that transfer from a low energy level to a high energy level 
D)  the intensity of agitation of atoms in a hot gas 
E)  the motion of an object toward or away from the observer

Question 2

Photons of light can be absorbed by an atom of an element ____.

Accepted Answer

A)  if they match one of several possible wavelengths that are absorbed by that element 
B)  if they match one of several possible wavelengths that are absorbed by all elements 
C)  if they match the only particular wavelength that can be absorbed by that element 
D)  if they match the only particular wavelength that can be absorbed by all elements 
E)  no matter what wavelength they have 
A)  if they match one of several possible wavelengths that are absorbed by that element 
B)  if they match one of several possible wavelengths that are absorbed by all elements 
C)  if they match the only particular wavelength that can be absorbed by that element 
D)  if they match the only particular wavelength that can be absorbed by all elements 
E)  no matter what wavelength they have

Question 3

Electromagnetic waves are generated whenever the ____.

Accepted Answer

A)  motion of any particle is changed 
B)  motion of any charged particle changes 
C)  motion of a positively charged particle is changed 
D)  motion of a negatively charged particle is changed 
E)  acceleration of any charged particle is changed 
A)  motion of any particle is changed 
B)  motion of any charged particle changes 
C)  motion of a positively charged particle is changed 
D)  motion of a negatively charged particle is changed 
E)  acceleration of any charged particle is changed

Question 4

Using Wien's law, you can measure the ____ of a distant object without having to travel to it.

Accepted Answer

A)  binding energy 
B)  temperature 
C)  radial motion 
D)  energy output 
E)  atomic composition 
A)  binding energy 
B)  temperature 
C)  radial motion 
D)  energy output 
E)  atomic composition

Question 5

Blackbody radiation only occurs in stars.

Accepted Answer

A) True 
 B)False

Question 6

The type of element is determined by the number of ____.

Accepted Answer

A)  protons in the atom 
B)  neutrons in the atom 
C)  electrons in the atom 
D)  electrons that have been removed from the atom 
E)  protons that have been removed from the atom 
A)  protons in the atom 
B)  neutrons in the atom 
C)  electrons in the atom 
D)  electrons that have been removed from the atom 
E)  protons that have been removed from the atom

Question 7

The Stefan-Boltzmann law relates the ____.

Accepted Answer

A)  energy emitted from a surface every second to the temperature of the surface 
B)  wavelength of peak intensity to the Kelvin temperature 
C)  binding energy to the Coulomb force 
D)  difference in energy level to the wavelength of the emitted photon 
E)  observed wavelength to the velocity of the object 
A)  energy emitted from a surface every second to the temperature of the surface 
B)  wavelength of peak intensity to the Kelvin temperature 
C)  binding energy to the Coulomb force 
D)  difference in energy level to the wavelength of the emitted photon 
E)  observed wavelength to the velocity of the object

Question 8

The photons coming from an excited gas create a(n) ____ spectrum.

Accepted Answer

A)  absorption 
B)  emission 
C)  continuous 
D)  Doppler 
E)  ionization 
A)  absorption 
B)  emission 
C)  continuous 
D)  Doppler 
E)  ionization

Question 9

A star like the Sun emits a(n) ____ spectrum.

Accepted Answer

A)  absorption 
B)  emission 
C)  continuous 
D)  Doppler 
E)  ionization 
A)  absorption 
B)  emission 
C)  continuous 
D)  Doppler 
E)  ionization

Question 10

An object moving away from the observer will exhibit a(n) _______________ shift due to the Doppler effect.

Accepted Answer

The answer of An object moving away from the observer...

Question 11

A(n) _______________ spectrum is produced by a hot, excited gas.

Accepted Answer

The answer of A(n) _______________ spectrum is produced by a...

Question 12

The terms "temperature" and "heat" are synonymous.

Accepted Answer

A) True 
 B)False

Question 13

What is the use of the Doppler effect able to tell you about the motion of an object? What is it unable to tell you?

Accepted Answer

The Doppler effect can only determine th

Question 14

The star Betelgeuse appears red; the star Rigel appears blue. What accounts for this difference?

Accepted Answer

A)  Betelgeuse and Rigel have different chemical compositions. 
B)  Betelgeuse is moving away from Earth, Rigel is moving toward Earth. 
C)  Betelgeuse is moving toward Earth, Rigel is moving away from Earth. 
D)  The surface of Betelgeuse is hotter than the surface of Rigel. 
E)  The surface of Betelgeuse is cooler than the surface of Rigel. 
A)  Betelgeuse and Rigel have different chemical compositions. 
B)  Betelgeuse is moving away from Earth, Rigel is moving toward Earth. 
C)  Betelgeuse is moving toward Earth, Rigel is moving away from Earth. 
D)  The surface of Betelgeuse is hotter than the surface of Rigel. 
E)  The surface of Betelgeuse is cooler than the surface of Rigel.

Question 15

Small differences in temperature between two stars produce small differences in the amount of energy they radiate.

Accepted Answer

A) True 
 B)False

Question 16

According to Wien's Law, a(n) ____.

Accepted Answer

A)  hotter object will emit more short-wavelength (bluer) radiation 
B)  hotter object will emit more long-wavelength (redder) radiation 
C)  cooler object will produce fewer photons 
D)  cooler object will produce more photons 
E)  object will produce the same number of photons at different temperatures 
A)  hotter object will emit more short-wavelength (bluer) radiation 
B)  hotter object will emit more long-wavelength (redder) radiation 
C)  cooler object will produce fewer photons 
D)  cooler object will produce more photons 
E)  object will produce the same number of photons at different temperatures

Question 17

Atoms are mostly empty space.

Accepted Answer

A) True 
 B)False

Question 18

The Doppler formula states that the ratio of the velocity of a source to the speed of light is equal to the ratio of the change in wavelength caused by the Doppler shift to the source wavelength, or γ/ c  = Δλ/λ.  
A spacecraft has yellow headlights which radiate 600-nm photons, and is travelling toward a stationary observer. If the spacecraft is travelling at a velocity of 1% of the speed of light (0.01 c ) , what will be the amount of the shift in wavelength observed (in nanometers) ?

Accepted Answer

The answer of The Doppler formula states that the ratio...

Question 19

The _______________ is the amount of energy needed to pull an electron completely away from the nucleus.

Accepted Answer

The answer of The _______________ is the amount of energy...

Question 20

The wavelength of maximum intensity is useful in measuring the ____.

Accepted Answer

A)  surface temperatures of an object from their colors 
B)  distance to an object from their colors 
C)  chemical composition of an object 
D)  motion of an object across the observer's line of sight 
E)  motion of an object toward or away from the observer 
A)  surface temperatures of an object from their colors 
B)  distance to an object from their colors 
C)  chemical composition of an object 
D)  motion of an object across the observer's line of sight 
E)  motion of an object toward or away from the observer

A continuous spectrum is produced by ____.

Photons of light can be absorbed by an atom of an element ____.

Electromagnetic waves are generated whenever the ____.

Using Wien's law, you can measure the ____ of a distant object without having to travel to it.

Blackbody radiation only occurs in stars.

The type of element is determined by the number of ____.

The Stefan-Boltzmann law relates the ____.

The photons coming from an excited gas create a(n) ____ spectrum.

A star like the Sun emits a(n) ____ spectrum.

An object moving away from the observer will exhibit a(n) _______________ shift due to the Doppler effect.

A(n) _______________ spectrum is produced by a hot, excited gas.

The terms "temperature" and "heat" are synonymous.

What is the use of the Doppler effect able to tell you about the motion of an object? What is it unable to tell you?

The star Betelgeuse appears red; the star Rigel appears blue. What accounts for this difference?

Small differences in temperature between two stars produce small differences in the amount of energy they radiate.

According to Wien's Law, a(n) ____.

Atoms are mostly empty space.

The _______________ is the amount of energy needed to pull an electron completely away from the nucleus.

The wavelength of maximum intensity is useful in measuring the ____.

Here and Now

A User S Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Gravity

Light and Telescopes

The Sun

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury: Comparing Airless Worlds

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology: Life on Other Worlds

Filters

Exam 7: Atoms and Spectra

A continuous spectrum is produced by ____.

Photons of light can be absorbed by an atom of an element ____.

Electromagnetic waves are generated whenever the ____.

Using Wien's law, you can measure the ____ of a distant object without having to travel to it.

Blackbody radiation only occurs in stars.

The type of element is determined by the number of ____.

The Stefan-Boltzmann law relates the ____.

The photons coming from an excited gas create a(n) ____ spectrum.

A star like the Sun emits a(n) ____ spectrum.

An object moving away from the observer will exhibit a(n) _______________ shift due to the Doppler effect.

A(n) _______________ spectrum is produced by a hot, excited gas.

The terms "temperature" and "heat" are synonymous.

What is the use of the Doppler effect able to tell you about the motion of an object? What is it unable to tell you?

The star Betelgeuse appears red; the star Rigel appears blue. What accounts for this difference?

Small differences in temperature between two stars produce small differences in the amount of energy they radiate.

According to Wien's Law, a(n) ____.

Atoms are mostly empty space.

The _______________ is the amount of energy needed to pull an electron completely away from the nucleus.

The wavelength of maximum intensity is useful in measuring the ____.

Here and Now

A User S Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Gravity

Light and Telescopes

The Sun

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury: Comparing Airless Worlds

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology: Life on Other Worlds

Filters