The de- Broglie wavelength of an electro...

The de- Broglie wavelength of an electron moving with a velocity `1.5xx10^(8) ms^(-1)` is equla to the wavelenght of a photon. The ratio of the kinetic energy of the electron to that of the energy of photon is

`2`

`4`

`(1)/(2)`

`(1)/(4)`

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