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In photoelectric experiment energy of 2.48 eV irradiates a photo sensitive material. The stopping potential was measured to be 0.5 ~V . Work function of the photo sensitive material is :

Options

  1. A1.68 eV
  2. B2.48 eV
  3. C1.98 eV
  4. D0.5 eV

Correct answer

C. 1.98 eV

Step-by-step solution

aligned & eV V _ s = h - & 0.5 ~V =2.48- & work function ( )=2.48 ~V -0.5 ~V =1.98 ~V aligned

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