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Question

When light of wavelength λ falls on the surface of a metal with threshold wavelength λ0, an electron of mass 'm' is emitted. The de Broglie wavelength of emitted electron is:

A
[h(λλ0)2mc(λλ0)]12
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B
[h(λ0λ)2mc(λλ0)]12
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C
[h(λλ0)2mc(λλ0)]12
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D
[hλλ02mc]12
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