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MHT CET202311 May 2023Evening ShiftPhysicsDual Nature of MatterActual

A metal surface of work function 1.13 eV is irradiated with light of wavelength 310 ~nm . The retarding potential required to stop the escape of photoelectrons is [Take hc =1240 10⁻⁹ SI units]

Options

  1. A1 13 ~V
  2. B2.87 ~V
  3. C3.97 ~V
  4. D4.23 ~V

Correct answer

B. 2.87 ~V

Step-by-step solution

Energy of incident light: aligned E & = h c e & = 1240 10⁻⁹ 310 10⁻⁹ & =4 ev aligned Stopping potential V ₀= hc e - ₀ e V ₀=4-1.13=2.87 ~V

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