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JEE PHYSICS MCQ: RAY OPTICS

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Application +4 | -1

Sun light falls normally on a surface of area

36 \mathrm{~cm}^2

and exerts an average force of

7.2 \times 10^{-9} \mathrm{~N}

within a time period of 20 minutes. Considering a case of complete absorption, the energy flux of incident light is

View answer and explanation

Correct option: D

0.06 \mathrm{~W} / \mathrm{cm}^2

Option D (

0.06 \mathrm{~W} / \mathrm{cm}^2

) is correct because it is calculated by using the formula for pressure exerted by light and relating it to the intensity.

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