Teaching Physics with the Physics Suite

Edward F. Redish

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Find your focus!

In the figure shown at the right, point O is a source of light. Two rays from O are shown reflecting from a curved mirrorand crossing each other at the point marked C. (The mirror is a part of a sphere but the curvature is not drawn to scale) On the figure, find the focus of the mirror by drawing appropriate rays. Explain why you drew the lines you did.

Page last modified February 18, 2009: OP35