A photon of wavelength `4400 Å` is passing through vaccum. The effective mass and momentum of the photon are respectively

Options

A. `5 xx 10^(-36) kg, 1.5 xx 10^(-27) kg - m//s`
B. `5 xx 10^(-35) kg, 1.5 xx 10^(-26) kg - m//s`
C. Zero , `1.5 xx 10^(-26) kg - m//s`
D. `5 xx 10^(-36) kg , 1.67 xx 10^(-43) kg - m//s`

Answer

A

Explanation

`p = (h)/(lambda) = (6.6 xx 10^(-34))/(4400 xx 10^(-10)) = 1.5 xx 10^(-27) kg . m//s`
and mass `m = (p)/( c ) = (1.5 xx 10^(-27))/(3 xx 10^(8)) = 5 xx 10^(-36) kg`