Question 1

A cool,thin gas produces absorption lines.

Accepted Answer

A) True 
 B)False

Question 2

What information about a star can be inferred from its Doppler shift?

Accepted Answer

The Doppler shift gi

Question 3

Describe two ways light can be separated out into its component colors in detail for spectroscopic analysis.

Accepted Answer

Newton passed light through a prism,wher

Question 4

The Zeeman effect reveals the presence of strong magnetic fields by the splitting of spectral lines.

Accepted Answer

A) True 
 B)False

Question 5

In Bohr's model of the atom,electrons:

Accepted Answer

A)  only make transitions between orbitals of specific energies. 
B)  are not confined to specific orbits. 
C)  are spread uniformly through a large, positive mass. 
D)  can be halfway between orbits. 
E)  move from orbit to orbit in many small steps. 
A)  only make transitions between orbitals of specific energies. 
B)  are not confined to specific orbits. 
C)  are spread uniformly through a large, positive mass. 
D)  can be halfway between orbits. 
E)  move from orbit to orbit in many small steps.

Question 6

The absorption lines for a cool thin gas are identical in color and energy to the emission lines of the same gas if hot enough to glow.

Accepted Answer

A) True 
 B)False

Question 7

The energy required to ionize a hydrogen atom whose electron is in the ground state (energy level 1)is:

Accepted Answer

A)  10.2 eV. 
B)  12.1 eV. 
C)  12.75 eV. 
D)  13.1 eV. 
E)  13.6 eV. 
A)  10.2 eV. 
B)  12.1 eV. 
C)  12.75 eV. 
D)  13.1 eV. 
E)  13.6 eV.

Question 8

The red hydrogen alpha line carries more energy per photon than the blue-green hydrogen beta line does.

Accepted Answer

A) True 
 B)False

Question 9

How can Kirchhoff's Laws be used to deduce something about the nature of the light source?

Accepted Answer

A continuous spectrum will peak at a cer

Question 10

The Balmer Beta absorption line is a result of a transition of an electron in a hydrogen atom from:

Accepted Answer

A)  level 2 to level 3. 
B)  level 2 to level 4. 
C)  level 3 to level 2. 
D)  level 4 to level 2. 
E)  None of the above. 
A)  level 2 to level 3. 
B)  level 2 to level 4. 
C)  level 3 to level 2. 
D)  level 4 to level 2. 
E)  None of the above.

Question 11

The Orion Nebula,M-42,is a hot,thin cloud of glowing gas,so its spectrum is:

Accepted Answer

A)  a continuum, strongest in the color red. 
B)  a few bright lines against a dark background. 
C)  a few dark lines in the continuum. 
D)  a continuum, but with both bright and dark lines mixed in. 
E)  not in the visible portion of the spectrum. 
A)  a continuum, strongest in the color red. 
B)  a few bright lines against a dark background. 
C)  a few dark lines in the continuum. 
D)  a continuum, but with both bright and dark lines mixed in. 
E)  not in the visible portion of the spectrum.

Question 12

In the atom,which particles give the element its identity (atomic number)?

Accepted Answer

A)  positrons 
B)  electrons 
C)  protons 
D)  neutrons 
E)  neutrinos 
A)  positrons 
B)  electrons 
C)  protons 
D)  neutrons 
E)  neutrinos

Question 13

Emission lines of hydrogen that are found in the ultraviolet part of the electromagnetic spectrum are formed by electrons transitioning from:

Accepted Answer

A)  any level to level 2. 
B)  level 2 to any level. 
C)  any level to level 1. 
D)  level 1 to any level. 
E)  any level to level 3. 
A)  any level to level 2. 
B)  level 2 to any level. 
C)  any level to level 1. 
D)  level 1 to any level. 
E)  any level to level 3.

Question 14

Which of the following type of electromagnetic radiation has the highest energy?

Accepted Answer

A)  radio 
B)  infrared 
C)  visible 
D)  ultraviolet 
E)  X-ray 
A)  radio 
B)  infrared 
C)  visible 
D)  ultraviolet 
E)  X-ray

Question 15

The line intensity of a spectrum depends both on the abundance of a particular element and its temperature as well.

Accepted Answer

A) True 
 B)False

Question 16

Explain what types of information can be obtained from a spectral line.

Accepted Answer

The element which created it,t

Question 17

The classical model of the hydrogen atom that explains its spectral line structure is due to:

Accepted Answer

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

Question 18

Only a hot,thin gas can produce an emission line.

Accepted Answer

A) True 
 B)False

Question 19

Typical stellar spectra appear as:

Accepted Answer

A)  a series of bright, colored lines. 
B)  an unbroken rainbow of colors. 
C)  a rainbow, but with some dark lines mixed in. 
D)  a rainbow with some bright lines on top of the continuum. 
E)  a very redshifted rainbow due to the expansion of the universe. 
A)  a series of bright, colored lines. 
B)  an unbroken rainbow of colors. 
C)  a rainbow, but with some dark lines mixed in. 
D)  a rainbow with some bright lines on top of the continuum. 
E)  a very redshifted rainbow due to the expansion of the universe.

Question 20

The Balmer lines of hydrogen involve electron transitions from the ground state to higher levels.

Accepted Answer

A) True 
 B)False

Exam 4: Spectroscopy: The Inner Workings of Atoms

A cool,thin gas produces absorption lines.

What information about a star can be inferred from its Doppler shift?

Describe two ways light can be separated out into its component colors in detail for spectroscopic analysis.

The Zeeman effect reveals the presence of strong magnetic fields by the splitting of spectral lines.

In Bohr's model of the atom,electrons:

The absorption lines for a cool thin gas are identical in color and energy to the emission lines of the same gas if hot enough to glow.

The energy required to ionize a hydrogen atom whose electron is in the ground state (energy level 1)is:

The red hydrogen alpha line carries more energy per photon than the blue-green hydrogen beta line does.

How can Kirchhoff's Laws be used to deduce something about the nature of the light source?

The Balmer Beta absorption line is a result of a transition of an electron in a hydrogen atom from:

The Orion Nebula,M-42,is a hot,thin cloud of glowing gas,so its spectrum is:

In the atom,which particles give the element its identity (atomic number)?

Emission lines of hydrogen that are found in the ultraviolet part of the electromagnetic spectrum are formed by electrons transitioning from:

Which of the following type of electromagnetic radiation has the highest energy?

The line intensity of a spectrum depends both on the abundance of a particular element and its temperature as well.

Explain what types of information can be obtained from a spectral line.

The classical model of the hydrogen atom that explains its spectral line structure is due to:

Only a hot,thin gas can produce an emission line.

Typical stellar spectra appear as:

The Balmer lines of hydrogen involve electron transitions from the ground state to higher levels.

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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