The momentum of a photon in an X - ray beam of `10^(-10) metre` wavelength is

Options

A. `1.5 xx 10^(-23) kg - m//sec`
B. `6.6 xx 10^(-24) kg - m//sec`
C. `6.6 xx 10^(-44) kg - m//sec`
D. `2.2 xx 10^(-52) kg - m//sec`

Answer

B

Explanation

Momentum of photon
`p = (h)/(lambda) = (6.6 xx 10^(-34))/(10^(-10)) = 6.6 xx 10^(-24) kg - m//sec`