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AP EAMCET2010PhysicsDual Nature of Matter

Photoelectric emission is observed from a metallic surface for frequencies v₁ and v₂ of the incident light (v₁>v₂ ) . If the maximum values of kinetic energy of the photoelectrons emitted in the two cases are in the ratio 1: n , then the threshold frequency of the metallic surface is

Options

  1. A(v₁-v₂ ) (n-1)
  2. B(n v₁-v₂ ) (n-1)
  3. C(n v₂-v₁ ) (n-1)
  4. D(v₁-v₂ ) n

Correct answer

B. (n v₁-v₂ ) (n-1)

Step-by-step solution

By using h v-h v₀=K_ h (v₁-v₀ )=K₁h (v₂-v₀ )=K₂ v₁-v₀ v₂-v₀ = K₁ K₂ = 1 n or v₀= n v₁-v₂ (n-1)

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