A point source of light is used in an experiment on photoelectric effect. Which of following curves

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11.Dual Nature of Radiation and matter

easy

A point source of light is used in an experiment on photoelectric effect. Which of the following curves best represents the variation of photo current $(i)$ with distance $(d)$ of the source from the emitter

A

$a$

B

$b$

C

$c$

D

$d$

Solution

(d) $I \propto \frac{1}{{{d^2}}}$ and photo current $i \propto I$

==> $i \propto \frac{1}{{{d^2}}}$

Standard 12

Physics

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