Electrons emitted when light strikes the surface of a metal is
a. photon emission.
b. photon absorption.
c. the photoelectric effect.
d. a laser.
e. an emission spectrum.
[Ques. 2] When the speed of an electron is increased the de Broglie wavelength is decreased.
a. True
b. False
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[Ques. 3] The fact that two electrons cannot occupy the same quantum state at the same time is the Heisenberg exclusion principle.
a. True
b. False
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[Ques. 4] The aurora borealis is an example of atoms and molecules in the atmosphere absorbing photons and exciting the atoms and molecules to emit spectra.
a. True
b. False
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[Ques. 5] If an electron acquires more than the ionization energy, the electron will return to the ground state.
a. True
b. False
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[Ques. 6] UPC price scanners at supermarket checkouts use laser holography to read the bar codes because the packages are three dimensional.
a. True
b. False
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[Ques. 7] A laser can be used for very accurate measurements of distances between objects.
a. True
b. False
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[Ques. 8] Light being amplified by stimulated emission of radiation is the principle of the photoelectric effect.
a. True
b. False
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[Ques. 9] A laser emits monochromatic and coherent light.
a. True
b. False
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[Ques. 10] At any instant in time, it is possible to specify simultaneously the position and the momentum of a particle to arbitrarily high precision.
a. True
b. False
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