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MHT CET Physics question

PhysicsDual Nature of Matter and RadiationMHT CET

On a photosensitive material, when frequency of incident radiation is increased by 30%, kinetic energy of emitted photoelectrons increases from 0.4 eV to 0.9 eV. The work function of the surface is [MHTCET 2017]

Answer: (B)

Solution

and ; subtracting, eV so eV and

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Question ID VK-083709