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MHT CET 2023 Physics question

PhysicsDual Nature of Matter and RadiationMHT CET 2023

From a metallic surface photoelectric emission is observed for frequencies and () of the incident light. The maximum values of the kinetic energy of the photoelectrons emitted in the two cases are in the ratio 1 : x. Hence the threshold frequency of the metallic surface is

Answer: (C)

Solution

By Einstein's photoelectric equation, . For the two frequencies: and . Given : , so $ - = xν_0 -

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Question ID VK-094703