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Show that the wavelength of electromagne...

Show that the wavelength of electromagnetic radiation is equal to the de-Broglie wavelength of its quantum (photon).

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The de Broglie wavelength of the photon is given by
`lamda=h/p`
Momentum of an electrons wave of frequency v and wavelength `lamda` is given as
`p=E/c=(hv)/c`
`:. Lamda=h/(hv//c)=c/v`
Which is the wavelength of electromagnetic radiation.
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