Question 1

The photoelectric effect helped establish the ________ nature of light.

Accepted Answer

The answer of The photoelectric effect helped establish the ________...

Question 2

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,...

Question 3

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 4

In the Bohr model, the transitions of electrons down to ground state produce the Lyman linesin the ultraviolet.

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

Define emission lines.

Accepted Answer

A hot, thin gas cools off by emitting ph

Question 7

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 8

Typical stellar spectra appear as:

Accepted Answer

A) emission lines. 
B) a continuous spectrum. 
C) a continuous spectrum with absorption lines. 
D) a continuous spectrum with emission lines. 
E) a mix of emission and absorption lines. 
A) emission lines. 
B) a continuous spectrum. 
C) a continuous spectrum with absorption lines. 
D) a continuous spectrum with emission lines. 
E) a mix of emission and absorption lines.

Question 9

Why is spectroscopy important to astronomers?

Accepted Answer

Virtually all the information we receive

Question 10

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 11

A prism or a diffraction grating can be used in a spectroscope to separate the colors (orwavelengths)of light.

Accepted Answer

A) True 
 B)False

Question 12

The emission line for a given atom shows spectral features at the ________ location as in itsabsorption spectrum.

Accepted Answer

The answer of The emission line for a given atom...

Question 13

Molecular spectra, like elemental ones, involve only the vibration of the particles.

Accepted Answer

A) True 
 B)False

Question 14

The Doppler effect causes spectral lines to:

Accepted Answer

A) narrow. 
B) broaden. 
C) split. 
D) disappear. 
E) brighten. 
A) narrow. 
B) broaden. 
C) split. 
D) disappear. 
E) brighten.

Question 15

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 16

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

Accepted Answer

A) Because of the larger number of electrons and corresponding energy levels, more transitionsare 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 atomcan 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 transitionsare 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 atomcan 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 17

A low-density, hot gas produces a continuous spectrum.

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

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

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

Exam 4: Spectroscopy: the Inner Workings of Atoms

The photoelectric effect helped establish the ________ nature of light.

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

In Bohr's model of the atom, electrons:

In the Bohr model, the transitions of electrons down to ground state produce the Lyman linesin the ultraviolet.

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

Define emission lines.

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

Typical stellar spectra appear as:

Why is spectroscopy important to astronomers?

An incandescent light (glowing tungsten filament)produces:

A prism or a diffraction grating can be used in a spectroscope to separate the colors (orwavelengths)of light.

The emission line for a given atom shows spectral features at the ________ location as in itsabsorption spectrum.

Molecular spectra, like elemental ones, involve only the vibration of the particles.

The Doppler effect causes spectral lines to:

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

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

A low-density, hot gas produces a continuous spectrum.

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

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

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

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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