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NEET 2010 Physics question

PhysicsDual Nature of Matter and RadiationNEET 2010

The electron in the hydrogen atom jumps from excited state () to its ground state () and the photons thus emitted irradiate a photosensitive material. If the work function of the material is 5.1 eV, the stopping potential is estimated to be (the energy of the electron in state )

Answer: (4)

Solution

Photon energy for the transition: . Photoelectric equation: $ = hν -

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Question ID VK-090353