We may state that the energy E of a photon of frequency v is E =hv, where h is a plank's constant. The momentum p of a photon is `p=h//lambda` where `lambda` is the wavelength of the photon. From the above statement one may conclude that the wave velocity of light is equal to

Options

A. `3xx10^(8) m//s`
B. `E//p`
C. `Ep`
D. `(E//p)^(2)`

Answer

b

Explanation

`E=hv` and `p=h//lambda`
So `E//p=hv//(h//lambda)=vlambda=c, i.e, c=E//p`