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# Quiz13 - Name Section Quiz 13C 1 A photon strikes a metal...

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Physics 222 Fall 2011 Name:_______________ Section:______________ Quiz 13A 1) A photon strikes a metal surface and releases an electron through the photoelectric effect. The work function of the metal surface is 8.00×10 -19 J. If the electron has energy of 5.00×10 -19 J, what is the largest wavelength the photon could have had? 2) If you chill an object to half its original temperature, at what fraction of its former intensity does it emit blackbody radiation?

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Physics 222 Fall 2011 Name:_______________ Section:______________ Quiz 13B 1) The threshold wavelength of a metal surface is 300 nm; that is, photons above that wavelength can’t release electrons from it through the photoelectric effect. What is the work function of the metal surface? 2) The dominant wavelength is the wavelength at which a blackbody radiates most strongly. If you chill an object to half its original temperature, by what factor does its dominant wavelength change?
Physics 222 Fall 2011

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Unformatted text preview: Name:_______________ Section:______________ Quiz 13C 1) A photon strikes a metal surface and releases an electron through the photoelectric effect. The work function of the metal surface is 4.00×10-19 J. If the electron has an energy of 2.00×10-19 J, what is the largest wavelength the photon could have had? 2) If you heat an object to 1.5 times its original temperature, by what factor does the intensity of its blackbody radiation increase? Physics 222 Fall 2011 Name:_______________ Section:______________ Quiz 13D 1) The threshold wavelength of a metal surface is 400 nm; that is, photons above that wavelength can’t release electrons from it through the photoelectric effect. What is the work function of the metal surface? 2) The dominant wavelength is the wavelength at which a blackbody radiates most strongly. If you heat an object to 1.5 times its original temperature, by what factor does its dominant wavelength change?...
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