Question

Light of wavelength from a sodium lamp falls on a photocell and causes the emission of photoelectrons for which the stopping potential is . With light of wavelength from a mercury vapor lamp, the stopping potential is . Then, the work function [in electron volts] of the photocell surface is

A

B

C

D

Medium
Solution
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Correct option is B)

Energy of is      

stopping potential is i.e,
work function of material =
                                        =

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