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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 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 ?

Aditi Chauhan , 11 Years ago
Grade 10
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