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MHT CET Medical202623 April 2026Evening ShiftPhysicsDual Nature of MatterActual

Light of frequency 4 ₀ is incident on the metal of threshold frequency ₀ . The maximum kinetic energy of the emitted photoelectron is ( h = Planck's constant)

Options

  1. A3h ₀
  2. B2h ₀
  3. C3 2 h ₀
  4. D1 2 h ₀

Correct answer

A. 3h ₀

Step-by-step solution

According to Einstein's photoelectric equation, the maximum kinetic energy of the emitted photoelectron is given by K_ max = h - h ₀ Given that the frequency of incident light is = 4 ₀ and the threshold frequency is ₀ . Substituting the values, we get K_ max = h(4 ₀) - h ₀ K_ max = 3h ₀ Answer: 3h ₀

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