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Luminous Intensity

The intensity...

Question

The intensity of light at a distance $r$ from the axis of a long cylindrical source is inversely proportional to $r$ .

A

True

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B

False

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Solution

The correct option is A True
$I = \frac{I_{o}}{r} ∴ I \propto \frac{1}{r}$
Intensity is inversely proportional to $r$ .

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