Davisson germer experiment.

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The first experimental evidence of de-Broglie hypothesis came from the experiment of davisson & germer in 1927. It is a matter of common experience that light exhibits diffraction occurance of various maximas can be explained by bragg's law. Davisson & germer showed experimentally that a beam of fast moving electron can also exhibit diffraction. Various maximas can be explained by bragg's law.

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