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  4. In an experiment on photoelectric effect the frequency V of the incident light is plotted against the stopping potential V0 . The work function of the photoelectric surface is given by (e is electronic charge)

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Q. In an experiment on photoelectric effect the frequency $V$ of the incident light is plotted against the stopping potential $V_{0} .$ The work function of the photoelectric surface is given by $(e$ is electronic charge)Physics Question Image

Dual Nature of Radiation and Matter

Solution:

Using Einstein's equation, $V_{0}=\left(\frac{h}{e}\right) v-\frac{W_{0}}{e}$
Comparing this equation with $y=m x +c$,
we get intercept on $-V_{0}$ axis as $-\frac{W_{0}}{e}$.
$\Rightarrow O B=\frac{W_{0}}{e}$
$\Rightarrow W_{0}=O B \times e$