Q. Momentum of a photon of wavelength $\lambda$ is
A) $h/\lambda$
B) $h\lambda/c^{2}$
C) $h\ \lambda/c$
D) Zero
Explanation
(a) Energy of photon $E = \frac{hc}{\lambda} = mc^{2};$
momentum of photon $= mc = h/\lambda$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.