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MHT CET 2022 Physics question

PhysicsDual Nature of Matter and RadiationMHT CET 2022

In photoelectric experiment the stopping potential was measured to be 'V' and 'V' volt with incident light of wavelength '' and respectively. The value of V is ( = work function, e = electronic charge)

Answer: (B)

Solution

Einstein's equation: . For wavelength : , so . For wavelength the photon energy doubles: $ = - φ_0 = + φ_0)

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Question ID VK-093911