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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 de - Broglie wavelengths associated with them is :

A

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

B

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

C

`c(2mE)^((1)/(2))`

D

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

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