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JEE Main 2025 (29 Jan, Shift 1) · Momentum & Radiation Pressure

Momentum & Radiation Pressure question from JEE Main 2025 (29 Jan, Shift 1)

Q2JEE Main 2025 · 29 JAN · SHIFT 1Easy

Momentum & Radiation Pressure

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Electromagnetic waves carry energy but not momentum.

Reason (R): Mass of a photon is zero.

In the light of the above statements, choose the most appropriate answer from the options given below:

Show answer and solution

Answer: (c)

  1. (A) False: EM waves carry both energy and momentum, p=U/cp = U/c.
  2. (R) True: the rest mass of a photon is zero.
  3. So the answer is (c).
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