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Electromagnetic waves and its nature

Question

If the intensity of the incident radio wave of 1wattm2 is reflected by the surface the pressure exerted on the surface is ________×109N/m2

Moderate
Solution

Pressure exerted by reflected wave on the surface is  P=2IC
Intensity of incident, radio wave is  I=1wattm2
Velocity of light ,  C=3×108ms1
Pressure ,   P=2×13×108                            P=6.67×109N/m2 
 



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