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Question

If the threshold wavelength (λ0) for the ejection of an electron from a metal is 110 nm, then the work function for the photoelectric emission is:
(Planck's constant (h) = 6.6×10341.8×1018 J s)

A
1.2×1018 J
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B
6×1019 J
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C
1.8×1019 J
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D
1.8×1018 J
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