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Light with energy flux `36Wm^(-3)` is incident on a circular part of radius `1.4m` of a perfectly balck body. The force experienced by the body and the momentum delivered in `10 minutes` areA. `2.2 muN`, `7.2 mu kgms^(-1)`B. `3.5 muN`, `7.4 mu kgms^(-1)`C. `0.74 muN`, `444 mu kgms^(-1)`D. `7.4 muN`, `2.2 mu kgms^(-1)` |
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Answer» Correct Answer - C Momentum `P=(U)/(C )=(IA t)/(C )`, Force `F=(IA)/(C )` |
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