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