The work function of some metals is listed below

Asked by admin @ 11/08/2021 in Chemistry viewed by 268 People

The work function (Ф) of some metals is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metal is

Answered by admin @ 11/08/2021

for energy in eV,

$e = \frac{1240}{\lambda}ev \\ e = \frac{1240}{300} = 4.13ev$

so for excitation of electron ,

$e \geqslant \phi \\$

so the metals which will show excitation are Cu,Ag, Fe, Pt,W

Answer is 5

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