Question:medium

Light with an energy flux of \(20 \, W \, cm^{-2}\) falls on a non-reflecting surface at normal incidence. If the surface has an area of \(25 \, cm^2\), then the total momentum delivered for complete absorption during a 15 minute time span is:

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For absorption of light: momentum delivered = \(E/c\).

Updated On: Jun 20, 2026

\(1 \times 10^{-3} \, kg\, m\, s^{-1}\)
\(1.8 \times 10^{-3} \, kg\, m\, s^{-1}\)
\(2 \times 10^{-3} \, kg\, m\, s^{-1}\)
\(1.5 \times 10^{-3} \, kg\, m\, s^{-1}\)

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The Correct Option is D

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