On a sunny summer day, with the sun overhead, you can
Chapter 19, Problem 1CQ(choose chapter or problem)
Problem 1CQ
On a sunny summer day, with the sun overhead, you can stand under a tree and look on the ground at the pattern of light that has passed through gaps between the leaves. You may see illuminated circles of varying brightness. Why are there circles, when the gaps between the leaves have irregular shapes?
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