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Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material, photoelectric current is emitted. If the frequency of light is halved and intensity is doubled, the photoelectric current becomes -

Option: 1

4 times the original current


Option: 2

2 times the original current


Option: 3

half the original current


Option: 4

zero times the original current


Answers (1)

\begin{aligned} & v_1=1.5 v_0 \\ & v_2=\frac{v_1}{2}=0.75 v_0<v_0 \end{aligned}
\Rightarrow photoelectric effect (P.E.E.) not possible.

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Sumit Saini

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