What is the mass of photon having wavelength 3.6 A
`(h= 6.6 xx 10^(34) kgm^(2) s^(-1) ,c=3 xx 10^(8) ms^(-1))`

Options

A. `6.135 xx 10^(29) kg`
B. `3.6 xx 10^(29) kg`
C. `6.135 xx 10^(33) kg`
D. `3.6 xx 10^(17) kg`

Answer

A

Explanation

`3.6 A =3.6 xx 10^(10) m`
`V= c= 3xx 10^(8) ms^(-1) ` Velocity of photon
According to de - Broglie `lambda = (h )/(m V)`
`m = (h)/( lambda v) = (6.626 xx 10^(34))/( 3.6 xx 10^(10) xx 3 xx 10^(8))`
`=6.135 xx 10^(29) kg`