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If is the work function of photosensitive material in eV and light of wavelength of numerical value = h c e metre, is incident on it with energy above its threshold value at an instant then the maximum kinetic energy of the photo-electron ejected by it at that instant (Take h -Plank's constant, c -velocity of light in free space) is (in SI units):

Options

  1. Ae+2
  2. B2 e-
  3. Ce-
  4. De+

Correct answer

C. e-

Step-by-step solution

( K . E )_ = h c - ₀ and = h c e ( K . E )_ = h c h c e - ₀ (K . E)_ =e- ₀ (K . E .)_ =e

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