A camper is trying to start a fi re by focusing sunlight
Chapter , Problem 112(choose chapter or problem)
A camper is trying to start a fi re by focusing sunlight onto a piece of paper. The diameter of the sun is 1.39 3 109 m, and its mean distance from the earth is 1.50 3 1011 m. The camper is using a converging lens whose focal length is 10.0 cm. (a) What is the area of the suns image on the paper? (b) If 0.530 W of sunlight passes through the lens, what is the intensity of the sunlight at the paper?
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