Dictionary![]() ![]() de Bro'glie equa"tionPhysics. the postulate of wave mechanics that a particle of mass m moving at a velocity v will have the properties of a wave of wavelength h/mv (de Bro'glie wave"length), where h is Planck's constant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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