AP EAMCET · PHYSICS · Dual Nature of Matter
Electromagnetic waves of energy flux \(75 \times 10^4\) \(\mathrm{Wm}^{-2}\) incidents normally on a surface of area \(40 \mathrm{~cm}^2\). If absorbs the surface the flux completely, the total momentum delivered to the surface in one second is
- A \(10^{-2} \mathrm{kgms}^{-1}\)
- B \(10^{-3} \mathrm{kgms}^{-1}\)
- C \(10^{-4} \mathrm{kgms}^{-1}\)
- D \(10^{-5} \mathrm{kgms}^{-1}\)
Answer & Solution
Correct Answer
(D) \(10^{-5} \mathrm{kgms}^{-1}\)
Step-by-step Solution
Detailed explanation
\begin{aligned} & \text { Momentum transferred }=\text { Force } \times \text { time } \\ & =\frac{I}{\mathrm{C}} \times \text { A Pressure } \times \text { Area } \times \Delta \mathrm{t}=\frac{\mathrm{I}}{\mathrm{C}} \times \mathrm{A} \times \Delta \mathrm{t} \\ & =\frac{75…
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