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Through the looking glass, part 2

The geometric diagram below is a trace of a ray of light from one point to another and through a crystal ball. Solving the equation for the angles is difficult because the "thin lens" equation is not useful for this situation. I have found that I can solve for some but not all of the angles. I would like to solve for the position of E, assuming certain givens, such as (1) positions of C and D, and (2) the radius of the circle.

Categories : sun-and-glass
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