Abstract
IN his well-known theory of the specific heat of solids, Einstein made the fundamental assumption that all the atoms in a crystal are capable of vibrating independently of one another with the same frequency. It was not meant as an exact description : the intention was to get a sufficiently good approximation without unessential intricacies. His theory has been recalled here at the outset because we find that his approximation is only an extreme form of the hypothesis to be formulated at the end of this note.
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Proc. Roy. Soc., A, July 1942.
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NATH, N. Dynamics of Real Crystals. Nature 151, 196 (1943). https://doi.org/10.1038/151196a0
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DOI: https://doi.org/10.1038/151196a0
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