Question 1

According to the Zeeman effect,the splitting of a sunspot's spectral lines is due to:

Accepted Answer

A)  their rapid rotation. 
B)  temperature variations. 
C)  their magnetic fields. 
D)  their radial velocity. 
E)  a Doppler shift. 
A)  their rapid rotation. 
B)  temperature variations. 
C)  their magnetic fields. 
D)  their radial velocity. 
E)  a Doppler shift. C

Question 2

The colors of a neon light arise because it is a(n)________ spectrum.

Accepted Answer

emission (or bright line)

Question 3

All Lyman emission lines are transitions from the excited state to ________ state.

Accepted Answer

ground

Question 4

A low density gas must be hot in order to produce an absorption line.

Accepted Answer

A) True 
 B)False

Question 5

The spectral lines of each element are distinctive to that element,whether we are looking at emission or absorption lines.

Accepted Answer

A) True 
 B)False

Question 6

The element first found in the Sun's spectrum,then on Earth 30 years later,is:

Accepted Answer

A)  hydrogen. 
B)  helium. 
C)  solarium. 
D)  technetium. 
E)  aluminum. 
A)  hydrogen. 
B)  helium. 
C)  solarium. 
D)  technetium. 
E)  aluminum.

Question 7

Define absorption lines.

Accepted Answer

When light from a continuous source,such

Question 8

If we increased the pressure in the gas of a blackbody,how will the spectral lines be affected?

Accepted Answer

The lines will broad

Question 9

All wavelengths of light travel at the same speed in a vacuum,and carry the same energy per photon.

Accepted Answer

A) True 
 B)False

Question 10

What information about an astronomical object can be determined by observing its spectrum?

Accepted Answer

A)  its temperature 
B)  its radial motion 
C)  its chemical composition 
D)  whether it has a strong magnetic field 
E)  All of the above 
A)  its temperature 
B)  its radial motion 
C)  its chemical composition 
D)  whether it has a strong magnetic field 
E)  All of the above

Question 11

A heavy neutral atom,such as iron,produces many spectral lines compared to light elements like hydrogen and helium.Why?

Accepted Answer

A)  Because of the larger number of electrons and corresponding energy levels, more transitions are possible. 
B)  Because of the larger number of electrons, there are many ionization levels possible. 
C)  Because of the larger number protons, the amount of force holding the electrons to the atom can vary between different iron atoms. 
D)  Because of the atom's larger size, it will be hit by more photons in a beam of light. 
A)  Because of the larger number of electrons and corresponding energy levels, more transitions are possible. 
B)  Because of the larger number of electrons, there are many ionization levels possible. 
C)  Because of the larger number protons, the amount of force holding the electrons to the atom can vary between different iron atoms. 
D)  Because of the atom's larger size, it will be hit by more photons in a beam of light.

Question 12

Why is spectroscopy important to astronomers?

Accepted Answer

Virtually all the information we receive

Question 13

How many blue photons (frequency of 6.50 × 10¹⁴ hz)per second would be required to carry 1 Watt (1 Watt = 1 Joule per second)of energy?

Accepted Answer

Using E = hf and h = 6.63 × 10

Question 14

The three laws dealing with the creation of various spectra are due to:

Accepted Answer

A)  Newton. 
B)  Fraunhofer. 
C)  Kirchhoff. 
D)  Bohr. 
E)  Einstein. 
A)  Newton. 
B)  Fraunhofer. 
C)  Kirchhoff. 
D)  Bohr. 
E)  Einstein.

Question 15

Because the changes in energy levels happen in discrete steps,we refer to these as ________ leaps.

Accepted Answer

The answer of Because the changes in energy levels happen...

Question 16

A hydrogen atom consists of an electron and a(n):

Accepted Answer

A)  proton. 
B)  ion. 
C)  neutrino. 
D)  neutron. 
E)  lepton. 
A)  proton. 
B)  ion. 
C)  neutrino. 
D)  neutron. 
E)  lepton.

Question 17

The longer the wavelength of the photon,the ________ the energy it carries.

Accepted Answer

The answer of The longer the wavelength of the photon,the...

Question 18

Which of these is the classic continuous spectrum?

Accepted Answer

A)  sunlight 
B)  a rainbow 
C)  a neon light 
D)  a fluorescent light 
E)  a glowing nebula, such as M-42 
A)  sunlight 
B)  a rainbow 
C)  a neon light 
D)  a fluorescent light 
E)  a glowing nebula, such as M-42

Question 19

The radial velocity of a star's motion in space can also broaden its spectral lines.

Accepted Answer

A) True 
 B)False

Question 20

An emission spectrum can be used to identify a(n):

Accepted Answer

A)  proton. 
B)  electron. 
C)  neutron. 
D)  atom. 
E)  neutrino. 
A)  proton. 
B)  electron. 
C)  neutron. 
D)  atom. 
E)  neutrino.

Exam 4: Spectroscopy: The Inner Workings of Atoms

According to the Zeeman effect,the splitting of a sunspot's spectral lines is due to:

The colors of a neon light arise because it is a(n)________ spectrum.

All Lyman emission lines are transitions from the excited state to ________ state.

A low density gas must be hot in order to produce an absorption line.

The spectral lines of each element are distinctive to that element,whether we are looking at emission or absorption lines.

The element first found in the Sun's spectrum,then on Earth 30 years later,is:

Define absorption lines.

If we increased the pressure in the gas of a blackbody,how will the spectral lines be affected?

All wavelengths of light travel at the same speed in a vacuum,and carry the same energy per photon.

What information about an astronomical object can be determined by observing its spectrum?

A heavy neutral atom,such as iron,produces many spectral lines compared to light elements like hydrogen and helium.Why?

Why is spectroscopy important to astronomers?

How many blue photons (frequency of 6.50 × 10¹⁴ hz)per second would be required to carry 1 Watt (1 Watt = 1 Joule per second)of energy?

The three laws dealing with the creation of various spectra are due to:

Because the changes in energy levels happen in discrete steps,we refer to these as ________ leaps.

A hydrogen atom consists of an electron and a(n):

The longer the wavelength of the photon,the ________ the energy it carries.

Which of these is the classic continuous spectrum?

The radial velocity of a star's motion in space can also broaden its spectral lines.

An emission spectrum can be used to identify a(n):

Charting the Heavens: The Foundations of Astronomy

The Copernican Revolution: The Birth of Modern Science

Radiation: Information from the Cosmos

Telescopes: The Tools of Astronomy

The Solar System: Comparative Planetology and Formation Models

Earth: Our Home in Space

The Moon and Mercury: Scorched and Battered Worlds

Venus: Earth's Sister Planet

Mars: A Near Miss for Life?

Jupiter: Giant of the Solar System

Saturn: Spectacular Rings and Mysterious Moons

Uranus and Neptune: The Outer Worlds of the Solar System

Solar System Debris: Keys to Our Origin

Exoplanets: Planetary Systems Beyond Our Own

The Sun: Our Parent Star

The Stars: Giants,Dwarfs,and the Main Sequence

The Interstellar Medium: Gas and Dust among the Stars

Star Formation: A Traumatic Birth

Stellar Evolution: The Life and Death of a Star

Stellar Explosions: Novae,Supernovae,and the Formation of the Elements

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: A Spiral in Space

Galaxies: Building Blocks of the Universe

Galaxies and Dark Matter: The Large-Scale Structure of the Cosmos

Cosmology: The Big Bang and the Fate of the Universe

The Early Universe: Toward the Beginning of Time

Life in the Universe: Are We Alone?

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