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NEET 2012 Physics question

PhysicsDual Nature of Matter and RadiationNEET 2012

Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material. The stopping potential is measured to be . The threshold frequency of the material is

Answer: (4)

Solution

Energy of the photon for the transition in hydrogen: . Einstein's photoelectric equation: . $ν_0 =

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Question ID VK-091278