The work function of a metal surface is 4.2 eV. The maximum wavelength
which can eject electrons from this metal surface is :
(a) 3076 Å
(b) 4116 Å
(c) 2956 Å
(d) 5088 Å.
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Explanation:
work function k=hc/wavelength
wavelength= 2956 angstrom.
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