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MHT CET Physics question

PhysicsDual Nature of Matter and RadiationMHT CET

A photosensitive metallic surface has work function . If photon of energy fall on this surface, the electron comes out with a maximum velocity of . When the photon energy is increased to , then maximum velocity of photoelectron will be

Answer: (A)

Solution

and , so and , giving $ =

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Question ID VK-083645