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MHT CET202411 May 2024Evening ShiftPhysicsDual Nature of MatterActual

A photoelectric surface is illuminated successively by monochromatic light of Wavelength and ( / 3) . If the maximum kinetic energy of the emitted photoelectrons in the second case is 4 times that in the first case, the work function of the surface of the material is ( h = Planck's constant, c = speed of light )

Options

  1. Ahc
  2. Bhc 2
  3. Chc 3
  4. D3 hc

Correct answer

C. hc 3

Step-by-step solution

aligned & 1^ st case: & E ₀= hc - ...(i) & 2^ nd case: & 4 E ₀= hc 3 - ...(ii) & 4 E ₀ E ₀ = 3 hc - hc - & 4 hc -4 = 3 hc - & = hc 3 aligned [ From(i) and (ii) ]

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