Looking for classes? Ksquare Career Institute, Bengaluru →
Momentum of a Photon
-
The momentum of a photon of energy 1 MeV in kg m/s, will be -For a photon, $E = pc$
$\Rightarrow p = \dfrac{E}{c}$
$E = 1$ MeV $= 10^{6} \times 1.6 \times 10^{-19}$ J $= 1.6 \times 10^{-13}$ J
$p = \dfrac{10^{6} \times 1.6 \times 10^{-19}}{3 \times 10^{8}}$
$p = 5.33 \times 10^{-22}$ kg m s$^{-1}$
$p \approx 5 \times 10^{-22}$ kg m/s