Physics - Geometrical Optics Question with Solution | TestHub

Sunlight of intensity$1.3 kW m^{-2}$is incident normally on a thin convex lens of focal length$20 cm$. Ignore the energy loss of light due to the lens and assume that the lens aperture size is much smaller than its focal length. The average intensity of light, in$kW m^{-2}$, at a distance$22 cm$from the lens on the other side is __________.