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Question

Intensity of light due to a point source at a distance $$2m$$ is $$20$$ units. The intensity due to the same source at a distance of $$4m$$ is

A

$$2.5\ units$$

B

$$6\ units$$

C

$$80\ units$$

D

$$5\ units$$

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Solution

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Correct option is D. $$5\ units$$

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