Question

The linear momentum of a $6MeV$ photon is

• A. $0.01eVs{m}^{-1}$
• B. $0.02eVs{m}^{-1}$
• C. $0.03eVs{m}^{-1}$
• D. $0.04eVs{m}^{-1}$

Answer 1

Answer: (B)

Energy of a photon, $E=6MeV=6\times 10^{6}eV$
Linear momentum of the photon
$p=\frac{E}{c}$
$P=\frac{6\times 10^{6}eV}{3\times 10^{8}m{s}^{-1}}$
$=2\times 10^{-2}eVs{m}^{-1}$
$=0.02eVs{m}^{-1}$