AP EAMCET · PHYSICS · Dual Nature of Matter
A light with an energy flux of \(18 \mathrm{~W} \mathrm{~cm}^{-2}\) falls on a non-reflecting surface at normal incidence. If the surface has an area of \(20 \mathrm{~cm}^2\), the average force exerted on the surface during a 30 minute time span is ____ \(\left(c=3 \times 10^8 \mathrm{~ms}^{-1}\right)\).
- A \(1.2 \times 10^{-6} \mathrm{~N}\)
- B \(2.1 \times 10^{-6} \mathrm{~N}\)
- C \(3.1 \times 10^{-6} \mathrm{~N}\)
- D \(4.8 \times 10^{-6} \mathrm{~N}\)
Answer & Solution
Correct Answer
(A) \(1.2 \times 10^{-6} \mathrm{~N}\)
Step-by-step Solution
Detailed explanation
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