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Grade: 12th pass 

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

Answers : (1)

Susmita
425 Points 
							
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
if it heps please approve.
2 years ago
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