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MHT CET20244 May 2024Morning ShiftPhysicsDual Nature of MatterActual

The threshold frequency of a metal is ' F₀ '. When light of frequency 2 ~F ₀ is incident on the metal plate, the maximum velocity of photoelectron is ' V ₁ ' When the frequency of incident radiation is increased to ' 5 ~F ₀ ', the maximum velocity of photoelectrons emitted is ' V ₂ '. The ratio of V ₁ to V ₂ is

Options

  1. A1 8
  2. B1 16
  3. C1 4
  4. D1 2

Correct answer

D. 1 2

Step-by-step solution

array ll & K E_ =h F-F₀ & When, F =2 ~F ₀ & 1 2 m V₁^2=2 hF ₀- F ₀= F ₀ & When, F =5 ~F ₀ & 1 2 m V₂^2=5 hF ₀- F ₀=4 ~F ₀ & ( ~V ₁ ~V ₂ )^2= F ₀ 4 ~F ₀ & ~V ₁ ~V ₂ = 1 2 array

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