Question 1

In our Sun, the spectral lines of hydrogen are weak, compared to their appearance in hotterstars.

Accepted Answer

A) True 
 B)False  True

Question 2

For hydrogen, the transition from the second to the fourth energy level produces:

Accepted Answer

A) a red emission line. 
B) a blue green absorption line. 
C) a violet emission line. 
D) an infrared emission line. 
E) an ultraviolet absorption line. 
A) a red emission line. 
B) a blue green absorption line. 
C) a violet emission line. 
D) an infrared emission line. 
E) an ultraviolet absorption line. B

Question 3

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. C

Question 4

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 5

In an atom, electrons can have only specific, allowed orbital energies.

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

His first law has dense hot objects crea

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

The spectra of molecules are more complex because molecules can vibrate and ________instead of just exhibiting electronic transitions like atoms.

Accepted Answer

The answer of The spectra of molecules are more complex...

Question 10

Which of the following types 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 11

The Doppler effect can reveal the rotation speed of a star by the splitting of the spectral lines.

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

The Doppler shift gi

Question 13

The ________ explains why the spectral lines from a rapidly rotating star are broader thanthose from a slowly rotating star.

Accepted Answer

The answer of The ________ explains why the spectral lines...

Question 14

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

Accepted Answer

When an electron moves from one energy l

Question 15

A binary star system is one with two stars orbiting each other. How can the Doppler effect beused 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 16

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

Accepted Answer

A) True 
 B)False

Question 17

Explain how the Zeeman effect allows us to study stellar magnetic fields.

Accepted Answer

The Zeeman effect causes spect

Question 18

State the relationship between photon energy, frequency, and wavelength.

Accepted Answer

The higher the frequ

Question 19

A cool, thin gas produces absorption lines.

Accepted Answer

A) True 
 B)False

Question 20

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.

Exam 4: Spectroscopy: the Inner Workings of Atoms

In our Sun, the spectral lines of hydrogen are weak, compared to their appearance in hotterstars.

For hydrogen, the transition from the second to the fourth energy level produces:

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

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

In an atom, electrons can have only specific, allowed orbital energies.

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

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

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

The spectra of molecules are more complex because molecules can vibrate and ________instead of just exhibiting electronic transitions like atoms.

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

The Doppler effect can reveal the rotation speed of a star by the splitting of the spectral lines.

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

The ________ explains why the spectral lines from a rapidly rotating star are broader thanthose from a slowly rotating star.

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

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

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

Explain how the Zeeman effect allows us to study stellar magnetic fields.

State the relationship between photon energy, frequency, and wavelength.

A cool, thin gas produces absorption lines.

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

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: Earths 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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