Physics · 2019
JEE Main · 10 April 2019, Shift 2 · Q21
Light is incident normally on a completely absorbing surface with an energy flux of 25 Wcm^-2. If the surface has an area of 25 cm^2, the momentum…
Light is incident normally on a completely absorbing surface with an energy flux of $\displaystyle 25 \mathrm{Wcm}^{-2}$. If the surface has an area of $\displaystyle 25 \mathrm{~cm}^2$, the momentum transferred to the surface in $\displaystyle 40$ min time duration will be :
Official answer
(3)
$\displaystyle 5.0 \times 10^{-3} \mathrm{Ns}$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.