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AP EAMCET201823 Apr 2018Evening ShiftPhysicsDual Nature of MatterActual

Photons of wavelength emitted by a source of power P incident on a photo cell. If the current produced in the cell is I , then the percentage of incident photons which produce current in the photo cell is. (where, h is Planck's constant and c is the speed of light in vacuum)

Options

  1. A100 e P c
  2. B100 e P I h c
  3. C100 / h e P_C
  4. D100 / h c e P

Correct answer

D. 100 / h c e P

Step-by-step solution

In photoemission, only one electron can produce one photon. So, if only x % of incident photons can produce electrons, then I= n t = 100 I h c e P

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