NEET · Physics · STD 12 - 8. Electromagnetic waves
Light with an average flux of \(20\, W / cm ^{2}\) falls on a non-reflecting surface at normal incidence having surface area \(20\, cm ^{2} .\) The energy recelved by the surface during time span of \(1\) minute is \(............J\)
- A \(48 \times 10^{3}\)
- B \(10 \times 10^{3}\)
- C \(12 \times 10^{3}\)
- D \(24 \times 10^{3}\)
Answer & Solution
Correct Answer
(D) \(24 \times 10^{3}\)
Step-by-step Solution
Detailed explanation
\(I =\frac{ E }{ At }\) \(E = IAt\)
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