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An electron of mass m and a photon have...

An electron of mass m and a photon have same energy E. The ratio of wavelength of electron to that of photon is `:` ( c being the velocity of light )

A

`(1)/(c ) ((2m )/( E ))^(1//2)`

B

` ((E )/( 2m ))^(1//2)`

C

`(1)/(c ) ((E )/( 2m ))^(1//2)`

D

`c( 2m E ) ^((1)/(2))`

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