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1. work function of a photo emissive surface is 2eV and stopping potential for electrons emitted is 2V. what is the energy of incident photon ? 2. a radio active sample contains 2x10 16 atoms . what is the number of atoms left uncharged after a decay time equal to half of its half life ? 3. what is the lateral shift for a ray of light incident along the normal to the surface of a glass slab of thickness t ?


  1. work function of a photo emissive surface is 2eV and stopping potential for electrons emitted is 2V. what is the energy of incident photon ?
 
  2. a radio active sample contains 2x1016 atoms . what is the number of atoms left uncharged after a decay time equal to half of its half life ?
 
  3. what is the lateral shift for a ray of light incident along the normal to the surface of a glass slab of thickness t ?


Grade:10

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