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Question
A photoelectric surface is illuminated successively by monochromatic light of wavelength λ and `λ/2`. If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times that in the first case, the work function of the material is
Options
`"hc"/λ`
`(2"hc")/λ`
`"hc"/(3λ)`
`"hc"/(2λ)`
Solution
`"hc"/(2λ)`
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