Five elements A, B, C, D and E have work functions 1.2 eV, 2.4 eV, 3.6 eV, 4.g eV and 6 eV respectively. If light of wavelength 4000Ao is allowed to fall on these elements, then photoelectrons are emitted by
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a
A, B and C
b
A.C.D and E
c
A and B
d
Only E
answer is C.
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Detailed Solution
E=123754000=3.09eV Photoetectrons emits if energy of incident light > work function.