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Question

If the threshold wavelength (λ0) for ejection of electron from metal is 330 nm, then work function for the photoelectric emission is:
(Planck's constant (h) = 6.6×1034 J s)

A
1.2×1018 J
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B
1.2×1020 J
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C
6×1019 J
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D
6×1012 J
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