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NEET2019PhysicsDual Nature of MatterActual

When light of wavelength is incident on a photosensitive surface, the stopping potential is V . When light of wavelength 3 is incident on same surface, the stopping potential is V / 6 . Threshold wavelength for the surface is

Options

  1. A2
  2. B3
  3. C4
  4. D5

Correct answer

D. 5

Step-by-step solution

Using Einstein's photoelectric equation From eqns. (i) and (ii), aligned & h c ₀ - 6 h c ₀ = h c - 6 h c 3 h c 6 = 5 h c 6 ₀ & or ₀=5 aligned

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