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Light with an energy flux of 18 W//cm^(2...

Light with an energy flux of `18 W//cm^(2)` falls on a non-reflacting surface at normal incidence. If the surface has an area of `20 cm^(2)`, find the average force exerted on the surface during a 30 minute time span.

Text Solution

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`1.2xx10^(-6)N`
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