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COMEDK2023PhysicsDual Nature of Matter

When a certain metal surface is illuminated with light of frequency v , the stopping potential for photoelectric current is V₀ . When the same surface is illuminated by light of frequency v 2 , the stopping potential is V₀ 4 . The threshold frequency for photoelectric emission is

Options

  1. Av 6
  2. Bv 3
  3. C2 v 3
  4. D4 v 3

Correct answer

B. v 3

Step-by-step solution

We know that, e V₀=h v- ₀ where, V₀= stopping potential and v= frequency of light. Case II e V₀ 4 = h v 2 - ₀ From Eqs. (i) and (ii), we get array rlrl & h v- ₀ =2 h v-4 ₀ & h v =3 ₀ h v=3 h v₀ v₀ & = h v 3 h v₀= v 3 array

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