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MediumQ. No. what-is-the-momentum-of-a-photon

What is the momentum of a photon?

Last Updated: 25 Jun 2026

AZero

Bhf/c

Cmc

Dhc/f

Correct Answer: hf/cYour Answer: B

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Explanation

Momentum of photon p = E/c = hf/c = h/λ even though photon has no rest mass.

Important Notes

de Broglie relation p = h/λ

SSC CGL Physics

SSC CGL

Answer

hf/c

Exam Info

Asked in: SSC, Railway, Banking and other competitive exams.
Also asked in: RRB NTPC, CHSL, State PCS and online mock tests.
Topic: SSC CGL Physics

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