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College Physics Reasoning and Relationships

Physics & Astronomy

Quiz 28 :

Quantum Theory

Quiz 28 :

Quantum Theory

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According to Einstein, as the wavelength of the incident monochromatic light beam becomes shorter, the work function of a target material in a phototube:
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D

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The ultraviolet catastrophe predicts that:
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D

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If a monochromatic light beam with quantum energy value of 4.0 eV is incident upon a photocell where the work function of the target metal is 1.60 eV, what is the maximum kinetic energy of ejected electrons?
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C

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What is the wavelength of a monochromatic light beam, where the photon energy is 2.00 eV? (h = 6.63 1034 Js, c = 3.00 108 m/s, 1 nm = 109 m, and 1 eV = 1.6 1019 J)
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Light of wavelength 6.1 107 m has an energy of: (h = 6.63 1034 Js, c = 3.00 108 m/s)
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According to Wien's displacement law, if the absolute temperature of a radiating blackbody is doubled, then the peak wavelength emitted will change by what factor?
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What is the wavelength of a monochromatic light beam, where the photon energy is 4.81 1019 J? (h = 6.63 1034 Js, c = 3.00 108 m/s, and 1 nm = 109 m)
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Of photons of red, yellow, light, and blue light, which photons have the least energy?
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If a blackbody is at 2000° C, what will be the peak wavelength emitted?
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If a quantum of radiation has an energy of 3.0 keV, what is its wavelength? (h = 6.63 1034 Js, 1 eV = 1.60 1019 J, c = 3.00 108 m/s, and 1 nm = 109 m)
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Surface #1 has work function img , and when bombarded with photons of wavelength img emits photoelectrons with maximum energy img . Surface #2 has work function img , and when bombarded by photons of wavelength img emits photoelectrons with maximum energy img . If img , then which of the following must be true?
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What is the surface temperature of a distant star (which emits light as if it were a blackbody) where the peak wavelength is 456 nm? (Hint: The surface of the human body at 35° C has a peak wavelength of 9.41 m). (1 nm = 109 m = 10-3 m)
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Blue light will not eject electrons from a certain metal; however, which one of the following may possibly eject electrons from that metal?
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As the temperature of a radiation emitting blackbody becomes lower, what happens to the peak wavelength of the radiation?
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What is the frequency of monochromatic light where the photon energy is 6.5 1019 J? (h = 6.63 1034 Js)
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Which of the following is an indication that one is dealing with a wave property instead of a particle property?
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A quantum of radiation has an energy of 1.3 keV. What is its frequency? (h = 6.63 1034 Js and 1 eV = 1.60 1019 J)
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Star A has the peak of its blackbody radiation at A. Star B has its peak at B, which is one-third that of A. If Star A's surface temperature is TA, how does the surface temperature TB of Star B compare?
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Classical theories predict that most of the energy from a blackbody should be radiated:
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Planck's quantum theory is compatible with the experimental data related to which of the following?
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