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Reflection of Parallel Rays by a Sphere
The green sphere reflects the incoming orange parallel rays that hit the surface at different angles. The angle between an incoming ray and its normal equals the angle between the outgoing ray and the normal, but with the sign reversed.



"Reflection of Parallel Rays by a Sphere" from The Wolfram Demonstrations Project
 http://demonstrations.wolfram.com/ReflectionOfParallelRaysByASphere/
Contributed by: Michael Schreiber
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