The chemical composition of stars can be determined from lines in their spectra.
a. True
b. False
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[Ques. 2] The characteristic peaks in an x-ray spectrum of an atom occur because of rapid deceleration of the bombarding electrons.
a. True
b. False
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[Ques. 3] 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.
a. True
b. False
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[Ques. 4] Photocopiers make use of the photoelectric effect.
a. True
b. False
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[Ques. 5] When the frequency of the light is increased in a photoelectric effect experiment, the energy of the emitted electrons increases.
a. True
b. False
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[Ques. 6] As the intensity of light is increased in a photoelectric effect experiment, the energy of the emitted electrons increases.
a. True
b. False
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[Ques. 7] Two different gases may have the same emission line spectrum.
a. True
b. False
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[Ques. 8] There is a direct correlation between the absorption and emission spectra of a particular gas.
a. True
b. False
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[Ques. 9] Perfect absorbers of electromagnetic radiation are also perfect emitters.
a. True
b. False
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[Ques. 10] The energy of an oscillating atom in a blackbody can be any value within a certain limited range.
a. True
b. False
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