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  9. Q35

WBCS 2024 · Question 35 of 196

A photon of frequency 50 Hz possesses _________ J energy. (h : Planck's constant, c : speed of light in vacuum)

Science - Physics

  1. A50 hCorrect
  2. Bh/50
  3. Chc/50
  4. D50 c

Answer: A. 50 h

Explanation

Official WBPSC key (Series A): (A) 50 h. Photon energy is given by E = hν. For ν = 50 Hz, E = 50h joules.

Source: WBCS (Exe) etc. (Prelim) 2024, Series A

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