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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 50 keV X-ray photon. The ratio of the energy of the photon to the kinetic energy of the electron is the energy equivalent of electron mass is 0.5 MeV)

A

`1:50`

B

`1:20`

C

`20:1`

D

`50:1`

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