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Power of point source is 18mW. Find the intensity 2.5 m away from source.

Power of point source is 18mW. Find the intensity 2.5 m away from source.

Grade:12th pass

1 Answers

Susmita
425 Points
3 years ago
Intensity is power transferred per area.Again area is proportional to length square.
Intensity=P/r2=18×10-3/(2.5)2=2.88 mW/m2
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