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Q. No.A point source is placed at the origin. Its intensity at a distance of \(2 ~\text{cm}\) from the source is \(I,\) then intensity at a distance \(4~\text{cm}\) from the source shall be:
1. \(\frac{I}{2}\)
2. \( \frac{I}{16}\)
3. \( \frac{I}{4}\)
4. \(I\)
1. \(\frac{I}{2}\)
2. \( \frac{I}{16}\)
3. \( \frac{I}{4}\)
4. \(I\)
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