An electron & a photon have same energy ...

An electron & a photon have same energy E. Find the ratio of de Broglie wavelength of electron to wavelength of photon. Given mass of electron is m & speed of light is C

A

`1/C sqrt(E/(2m))`

B

`C sqrt(E/m)`

C

`1/C sqrt(2mE)`

D

`1/C sqrt(E/m)`

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