True/False
Indicate whether the
statement is true or false.
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1.
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The integer value “n” in the equation for energy of vibration can
have any value.
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2.
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The emission of electrons from a metallic surface depends on the intensity of
the incident radiation.
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3.
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Atoms emit radiation only when their vibrational energy changes.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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4.
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The energy of a photon is inversely proportional to its _____
a. | intensity | c. | wavelength | b. | frequency | d. | all of the
above |
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5.
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Which function correctly expresses how to determine the energy of a
photon?
a. | E = heV | c. | E = hf | b. | E = hn | d. | E = hv |
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6.
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The Compton effect supports
a. | both models of light. | c. | neither particle nor wave model of light. | b. | the wave model of
light. | d. | the particle model
of light. |
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7.
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In the photoelectric effect, light displays properties that are like a
_____.
a. | neither a wave nor a particle | c. | wave | b. | particle | d. | both a wave and a particle |
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8.
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The de Broglie equation shows that subatomic particles have properties
that
a. | are particle-like. | b. | are wave-like. | c. | have properties of
both waves and particles. | d. | have properties of
atoms. |
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9.
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The energy of a photon is:
a. | inversely proportional to its wavelength | c. | directly proportional to its
wavelength | b. | not related to wavelength | d. | identical to its wavelength |
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10.
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Which phenomenon demonstrates the particle nature of light?
a. | Interference | c. | Diffraction | b. | Photoelectric effect | d. | Refraction |
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11.
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Electromagnetic waves have properties that are _____.
a. | particle-like | c. | neither a nor b | b. | wave-like | d. | both a and b |
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12.
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Which principle states that it is impossible to measure precisely both the
position and momentum of a particle at the same time?
a. | Avogadro’s principle | c. | Pauli exclusion
principle | b. | Aufbau principle | d. | Heisenberg uncertainty principle |
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13.
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A device which causes a door to automatically open is an example of light
displaying properties that are _____.
a. | both a particle and a wave | c. | neither a particle or a
wave | b. | particle-like | d. | wave-like |
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14.
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When electromagnetic radiation above the threshold frequency falls on an object,
it emits electrons:
a. | after a small time delay | b. | without any time delay | c. | after a very large
time delay | d. | with a variable time delay |
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Completion
Complete each
statement.
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15.
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The following equation is used to solve for the ____________________ p =
hf/c
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16.
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In the de Broglie wavelength equation, a moving particle’s wavelength is
equal to ____________________ divided by the particle’s momentum.
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17.
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The ____________________ of a particle is expressed in the following equation:
p=h/l.
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Matching
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Match the following term with the description a. | Compton effect | d. | photon | b. | de Broglie wavelength | e. | emission spectrum | c. | Heisenberg
uncertainty principle | f. | quanta |
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18.
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the idea that the precise location and momentum of a particle cannot be
measured simultaneously
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19.
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quotient of Planck’s constant and momentum
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20.
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the effect of the loss of energy of scattered photons
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21.
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light emitted over a range of frequencies
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22.
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a quanta of light energy
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23.
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discrete “bundles”
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Short Answer
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24.
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Describe how the photoelectric effect produces energy for a home using solar
panels.
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25.
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Describe what effect is used in solar panels to produce energy for a
home.
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26.
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Write the equation to solve for the de Broglie wavelength.
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27.
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Why is it impossible to measure precisely both the position and momentum of a
particle at the same time?
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28.
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The kinetic energy of the electrons when radiation of a certain wavelength falls
on metal A is 1.900 eV. When the same radiation falls on metal B, the kinetic energy of the electrons
is 2.700 eV. If the threshold wavelength of metal A is 140.0 nm, find the threshold wavelength of
metal B.
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29.
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What equation is used to determine the energy of vibration?
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30.
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Describe what it means to say “energy is quantized.”
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31.
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Would the wavelength for a 1.5 kg object traveling at 20 m/s be visible?
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32.
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Two cannon balls are fired. The first cannon ball has a mass of 8.80 kg and a
velocity of 95.0 m/s. The second cannon ball has a mass of 7.00 kg and a velocity of 1.50 ´ 102 m/s. Find the de Broglie wavelengths for both the
balls.
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33.
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Describe two circumstances in which light behaves as a particle.
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34.
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Name a familiar example in which light displays particle-like properties.
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35.
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What is the constant used to substitute for hc in the equation, E = hc/l?
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Problem
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36.
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What is the velocity of an electron whose kinetic energy is 1.98 eV?
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