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When the momentum of a photon is chagned by an amount p ' then the corresponding change in the de-Broglie wavelength is found to be 0 . 2 % . Then, the original momentum of the photon was

Options

  1. A300 p ′
  2. B500 p ′
  3. C400 p ′
  4. D600 p ′

Correct answer

B. 500 p ′

Step-by-step solution

∵ λ = h p ∴ λ ∝ 1 p ⇒ Δ p p = - Δ λ λ ∴ Δ p p = Δ λ λ ⇒ p ′ p = 0.20 100 = 1 500 ⇒ p = 500 p ′

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