Question

The momentum of a photon is 2 x 10-16 gm-cm/s. Its energy is

(1) 0.61 x 26
erg
(2) 2 x 10 26
erg

(4) 6 x 10-3 erg

(3) 6 x 10-6 erg

Answer 1

6 x 10^-6 erg Is the answer