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] UPC price scanners at supermarket checkouts use laser holography to read the bar codes because the packages are three dimensional.
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[Ques. 3] A laser can be used for very accurate measurements of distances between objects.
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[Ques. 4] Light being amplified by stimulated emission of radiation is the principle of the photoelectric effect.
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[Ques. 5] A laser emits monochromatic and coherent light.
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[Ques. 6] At any instant in time, it is possible to specify simultaneously the position and the momentum of a particle to arbitrarily high precision.
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[Ques. 7] The chemical composition of stars can be determined from lines in their spectra.
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[Ques. 8] The characteristic peaks in an x ray spectrum of an atom occur because of rapid deceleration of the bombarding electrons.
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[Ques. 9] Characteristic peaks occur in an x ray spectrum of an atom because electrons in the atom make transitions to lower energy levels after being bombarded with high energy electrons.
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[Ques. 10] Photocopiers make use of the photoelectric effect.
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