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9 Cards in this Set
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The classical approach to the description of black-body radiation results in the _________
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ultraviolet catastrophe
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To avoid the ultraviolet catastrophe, Planck proposed that _______.
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To avoid the ultraviolet catastrophe, Planck proposed that the electromagnetic field could take up energy only in discrete amounts.
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The thermal properties of solids, specifically their heat capacities, also provide evidence that the vibrations of atoms ________.
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The thermal properties of solids, specifically their heat capacities, also provide evidence that the vibrations of atoms can take up energy only in discrete amounts.
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True or False: Atomic and molecular spectra show that atoms and molecules can take up energy only in discrete amounts.
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True
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True or False: Atomic and molecular spectra show that atoms take up energy in discrete amounts, but molecules do not.
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False: Atomic and molecular spectra show that atoms and molecules can take up energy only in discrete amounts.
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The __________ establishes the view that electromagnetic radiation, regarded in classical physics as wave-like, consists of particles called photons.
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photoelectric effect
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What are the implications of the photoelectric effect?
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The photoelectric effect establishes the view that electromagnetic radiation, regarded in classical physics as wave-like, consists of particles called photons.
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The __________ establishes the view that electrons, regarded in classical physics as particles, are wave-like with a wavelength given by the de Broglie relation.
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diffraction of electrons
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The diffraction of electrons establishes the view that electrons, regarded in classical physics as particles, are wave-like with a wavelength given by the ____________.
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de Broglie relation
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