Work function of six metals A,B,C,D,E,F are 2eV, 2.5eV, 3eV, 3.5eV, 4eV,4.5eV respectively. A photon of wavelength 400 nm is incident on each of the metal surface. Number of metals showing photoelectric effect
(A) 3
(B) 4
(C) 2
(D) 5
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Answer:
A )3
Explanation:
Energy of incident radiation (in eV) = 1240/400=3.1eV
only A,B,C show photoelectric effect
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