MHT CET 2024 Physics question
A photoelectric surface is illuminated successively by monochromatic light of wavelength and . If the maximum kinetic energy of the emitted photoelectrons in the second case is 4 times that in the first case, the work function of the surface of the material is ( h = Planck's constant, c = speed of light)
Answer: (C)
Solution
Einstein's equation . Case 1 (wavelength ): . Case 2 (wavelength ): . Given :
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