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  4. If the distance between point light source and screen is doubled then intensity of light will be:

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Q. If the distance between point light source and screen is doubled then intensity of light will be:

Rajasthan PMTRajasthan PMT 1997

Solution:

Intensity is inversely proportional to the square of distance between source and screen. So, if distance is doubled, then intensity will become $ \frac{1}{4}th $ .