First slide

Photoelectric effect and study of photoelectric effect

Question

In the following diagram if $V_{2} > V_{1}$ then

Moderate

A

$λ_{1} = \sqrt{λ_{2}}$
B

$λ_{1} < λ_{2}$
C

$λ_{1} = λ_{2}$
D

$λ_{1} > λ_{2}$

Solution

$\begin{array}{l} V_{0} = (\frac{h}{e}) v - (\frac{W_{0}}{e}) . From the graph V_{2} > V_{1} . \\ \Rightarrow \frac{h v_{2}}{e} - \frac{W_{0}}{e} > \frac{h v_{1}}{e} - \frac{W_{0}}{e} \\ \Rightarrow v_{2} > v_{1} \\ \Rightarrow λ_{1} > λ_{2} (as λ \propto \frac{1}{v}) \end{array}$

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