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University Physics with Modern Physics 2nd Edition By Wolfgang Bauer, Gary Westfall
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University Physics with Modern Physics 2nd Edition By Wolfgang Bauer, Gary Westfall
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University Physics with Modern Physics 2nd Edition By Wolfgang Bauer, Gary Westfall
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Test Bank For University Physics with Modern Physics2nd Edition By Wolfgang Bauer, Gary Westfall
Four students made a graphic organizer describing the parts of the atom.
Which table best describes the parts of the atom? - ANSWER: D
J.J. Thompson is credited with discovering the - ANSWER: electron
An absorption spectrum of oxygen is shown below.
What is most likely the emission spectrum of oxygen? - ANSWER: D
Which statement is part of Bohr's atomic model? - ANSWER: Electrons absorb or
emit light when they change energy levels.
Changes in the appearance of emission and absorption spectrums are caused by the
activities of - ANSWER: electrons
What type of spectrum is shown below? - ANSWER: absorption
What causes the appearance of lines in an emission spectrum? - ANSWER: Light is
released as an electron moves to a lower energy state.
What is the main difference between the Schrödinger model and the Bohr atomic
model? - ANSWER: Bohr believed electron orbits were circular, but Schrödinger's
equations represent complex shapes describing the probable locations of electrons.
Which best explains what happens when an electron moves from an excited state to
the ground state? - ANSWER: The electron releases energy as it moves to a lower
energy level.
What is released when an excited electron returns to a lower energy state? -
ANSWER: electromagnetic radiation
Which transition by an electron will release the greatest amount of energy? -
ANSWER: A
This image shows a stream of positively charged particles being directed at gold foil.
The positively charged particles are called "alpha particles" and each one is like a
nucleus without any electrons.
What is the best explanation for why a particle is striking point X?
, Alpha parti - ANSWER: When the dense, positive alpha particle passes close to a
positive nucleus of gold, the alpha particle repels and hits the screen at point X.
Which phenomena support only the particle theory of light? Check all that apply. -
ANSWER: 4 & 5
traveling in a straight path
photoelectric effect
Wilam made a chart to summarize the results of experiments with the photoelectric
effect.
Which best describes how to correct Wilam's error? - ANSWER: The first result
should state that frequencies of light that were lower than the frequency threshold
of the metal could not eject electrons.
What is the smallest packet of electromagnetic energy that can be absorbed or
emitted? - ANSWER: a quantum
Which theory was contradicted by experiments with the photoelectric effect? -
ANSWER: Visible light, regardless of color, will cause the ejection of electrons when
striking metal.
Which observation supports the idea that light is made of particles? - ANSWER: Light
moves in a straight path.
What is the formula for calculating the energy of a photon? - ANSWER: e=hf
How does refraction support the particle theory of light? - ANSWER: Forces act on
the particles to push or pull them from one medium to another.
Which describes a relationship when calculating the energy of a photon? - ANSWER:
The energy of the photon is directly proportional to frequency.
What is the energy of a photon with a frequency of 3.6 × 1015 Hz? Planck's constant
is 6.63 × 10-34 J•s. - ANSWER: 2.4 × 10-18 J
The photoelectric effect occurs when ____ are emitted from metal when the metal is
struck by light of certain frequencies. - ANSWER: electrons
Heinrich Hertz used properties of which type of wave to support the idea that light is
also made of waves? - ANSWER: radio
According to Einstein, nothing in the universe can move faster than which
approximate speed? - ANSWER: 3.0 × 108 m/s
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