First slide

Photoelectric effect and study of photoelectric effect

Question

In a photoelectric effect experiment, the graph of stopping potential V versus reciprocal of wavelength obtained is shown in the figure. As the intensity of incident radiation is increased:

Easy

A

Graph does not change
B

Slope of the straight line get more steep
C

Straight line shifts to left
D

Straight line shifts to right

Solution

$\begin{array}{l} \frac{h c}{λ} = φ + e V \\ \Rightarrow V = (\frac{h c}{e}) \frac{1}{λ} - \frac{φ}{e} \end{array}$
Slope $(\frac{h c}{e})$ and intercept $(- \frac{φ}{e})$ , both are independent of intensity of incident radiation.

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