Question 1

Spectroscopy of a star can reveal its temperature,composition,and line-of-sight motion.

Accepted Answer

A) True 
 B)False

Question 2

The broadening of spectral lines can be caused by:

Accepted Answer

A)  density of the hot medium. 
B)  thermal motion of the hot atoms. 
C)  rotation of the star. 
D)  magnetic fields of the star. 
E)  All of the above 
A)  density of the hot medium. 
B)  thermal motion of the hot atoms. 
C)  rotation of the star. 
D)  magnetic fields of the star. 
E)  All of the above

Question 3

The splitting of spectral lines in the presence of strong magnetic fields is the:

Accepted Answer

A)  Doppler effect. 
B)  Second Law of Kirchhoff. 
C)  Zeeman effect. 
D)  photoelectric effect. 
E)  polarization of sunlight. 
A)  Doppler effect. 
B)  Second Law of Kirchhoff. 
C)  Zeeman effect. 
D)  photoelectric effect. 
E)  polarization of sunlight.

Question 4

The particle which adds mass but no charge to the atomic nucleus is the:

Accepted Answer

A)  positron. 
B)  proton. 
C)  neutron. 
D)  neutrino. 
E)  alpha particle. 
A)  positron. 
B)  proton. 
C)  neutron. 
D)  neutrino. 
E)  alpha particle.

Question 5

If the magnetic fields are very strong,such as around sunspots,how are spectral lines affected by the Zeeman effect?

Accepted Answer

A strong magnetic fi

Question 6

A(n)________ spectrum is created by a glowing,hot thin gas,such as M-42 in Orion.

Accepted Answer

The answer of A(n)________ spectrum is created by a glowing,hot...

Question 7

A neon light (thin hot neon gas in a sealed tube)gives us:

Accepted Answer

A)  a continuous spectrum, since the neon is hot enough to glow. 
B)  a few bright emission lines, telling us the gas is neon. 
C)  a continuum, with dark lines identifying the neon atoms that are present. 
D)  a lot of random bright red lines due to the motion of the hot atoms. 
E)  nothing visible to us, but a lot of infrared lines as heat. 
A)  a continuous spectrum, since the neon is hot enough to glow. 
B)  a few bright emission lines, telling us the gas is neon. 
C)  a continuum, with dark lines identifying the neon atoms that are present. 
D)  a lot of random bright red lines due to the motion of the hot atoms. 
E)  nothing visible to us, but a lot of infrared lines as heat.

Question 8

The shorter a wave's wavelength,the greater its energy.

Accepted Answer

A) True 
 B)False

Question 9

According to the photoelectric effect in order to release electrons from a solid,the light incident upon it must:

Accepted Answer

A)  have a high intensity. 
B)  have a low intensity. 
C)  have a long wavelength. 
D)  have a short wavelength. 
E)  None of the above. 
A)  have a high intensity. 
B)  have a low intensity. 
C)  have a long wavelength. 
D)  have a short wavelength. 
E)  None of the above.

Question 10

To have a negative ion,you must have:

Accepted Answer

A)  taken away a proton from the nucleus. 
B)  added a positron to the nucleus. 
C)  added a positron to the outer electron shell. 
D)  added an electron to the outer electron shell. 
E)  None of these; only positive ions can exist in nature. 
A)  taken away a proton from the nucleus. 
B)  added a positron to the nucleus. 
C)  added a positron to the outer electron shell. 
D)  added an electron to the outer electron shell. 
E)  None of these; only positive ions can exist in nature.

Question 11

The Great Nebula in Orion,M-42,is a low-density cloud of hot gas.Use Kirchhoff's laws to describe its spectrum.

Accepted Answer

Kirchhoff's second law notes t

Question 12

A binary star system is one with two stars orbiting each other.How can the Doppler effect be used to find binary stars whose orbital plane is along our line of sight? Their periods?

Accepted Answer

As the two stars orbit each other rapidl

Question 13

An X-ray photon has more energy than a visible photon.

Accepted Answer

A) True 
 B)False

Question 14

How are we able to determine the chemical composition and temperature of any visible object?

Accepted Answer

When an electron moves from one energy l

Question 15

Define emission lines.

Accepted Answer

A hot,thin gas cools off by emitting pho

Question 16

The observed spectral lines of a star are all shifted towards the red end of the spectrum.Which statement is true?

Accepted Answer

A)  This is an example of the photoelectric effect. 
B)  This is an example of the Doppler effect. 
C)  The second law of Kirchhoff explains this. 
D)  The star is not rotating. 
E)  The star has a radial velocity towards us. 
A)  This is an example of the photoelectric effect. 
B)  This is an example of the Doppler effect. 
C)  The second law of Kirchhoff explains this. 
D)  The star is not rotating. 
E)  The star has a radial velocity towards us.

Question 17

Kirchhoff was the first to describe qualitatively the types of spectra we observe from luminous objects.Describe the three types and their sources.

Accepted Answer

His first law has dense hot objects crea

Question 18

An incandescent light (glowing tungsten filament)produces:

Accepted Answer

A)  a continuous spectrum, with the peak giving the temperature of the filament. 
B)  an emission spectrum, with bright lines due to ionized tungsten. 
C)  an absorption spectrum, with dark lines due to the solid filament. 
D)  a continuum, with bright tungsten lines added. 
E)  a continuum, with dark lines of tungsten and argon as well. 
A)  a continuous spectrum, with the peak giving the temperature of the filament. 
B)  an emission spectrum, with bright lines due to ionized tungsten. 
C)  an absorption spectrum, with dark lines due to the solid filament. 
D)  a continuum, with bright tungsten lines added. 
E)  a continuum, with dark lines of tungsten and argon as well.

Question 19

The energy required to move an electron in a hydrogen atom from energy level 1 to energy level 2 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 20

The broader the spectral line,the higher the pressure of the gas that is creating it.

Accepted Answer

A) True 
 B)False

Exam 4: Spectroscopy: The Inner Workings of Atoms

Spectroscopy of a star can reveal its temperature,composition,and line-of-sight motion.

The broadening of spectral lines can be caused by:

The splitting of spectral lines in the presence of strong magnetic fields is the:

The particle which adds mass but no charge to the atomic nucleus is the:

If the magnetic fields are very strong,such as around sunspots,how are spectral lines affected by the Zeeman effect?

A(n)________ spectrum is created by a glowing,hot thin gas,such as M-42 in Orion.

A neon light (thin hot neon gas in a sealed tube)gives us:

The shorter a wave's wavelength,the greater its energy.

According to the photoelectric effect in order to release electrons from a solid,the light incident upon it must:

To have a negative ion,you must have:

The Great Nebula in Orion,M-42,is a low-density cloud of hot gas.Use Kirchhoff's laws to describe its spectrum.

A binary star system is one with two stars orbiting each other.How can the Doppler effect be used to find binary stars whose orbital plane is along our line of sight? Their periods?

An X-ray photon has more energy than a visible photon.

How are we able to determine the chemical composition and temperature of any visible object?

Define emission lines.

The observed spectral lines of a star are all shifted towards the red end of the spectrum.Which statement is true?

Kirchhoff was the first to describe qualitatively the types of spectra we observe from luminous objects.Describe the three types and their sources.

An incandescent light (glowing tungsten filament)produces:

The energy required to move an electron in a hydrogen atom from energy level 1 to energy level 2 is:

The broader the spectral line,the higher the pressure of the gas that is creating it.

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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