The slide states a problem with 50% of sun's ray \ I D rangle is absorbed by atmosphere, 20% of the ray incident on a leaf is absorbed. How much of the sun's intensity I_{0} is absorbed by the leaf?

Suppose the intensity of the ray from sun is : Let atmosphere absorb 50% of it. Suppose a leaf absorbs 20% of the ray incident on it. > Q: How much energy is used by the leaf in 20 minutes. Let the area of the leaf be 4cm2