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The de-Broglie wavelength of an electron...

The de-Broglie wavelength of an electron is the same as that of a photon.If "],[" velocity of electron is "25%" of the velocity of light,then the ratio of K.E.of electron and K.E.of photon will be:

A

`1/8`

B

`1/4`

C

`8/1`

D

`1/1`

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