The mass of a photon with a wavelength equal to `1.54 xx 10^-8 cm` is.

Options

A. `0.8268xx10^(-34)kg`
B. `1.2876xx10^(-33)kg`
C. `1.4285xx10^(-32)kg`
D. `1.8884xx10^(-32)kg`

Answer

C

Explanation

We know that `lamda=h/(mv)," "thereforem=h/(lamdav)`
The velocity of photon (v) = `3xx10^(8)msec^(-1)`
`lamda=1.54xx10^(-8)cm=1.54xx10^(-10)` meter
`thereforem=(6.626xx10^(-34)Js)/(1.54xx10^(-10)mxx3xx10^(8)msec^(-1))`
= `1.4285xx10^(-32)kg`.