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Secret of the Mirage®

Red ball sitting in Mirage. The Mirage® consists of two concave mirrors facing one another. The top mirror has a circular opening. The object rests on the bottom mirror. Light ray #1. The ray diagram consists of two light rays as in previous cases. Each ray path has three parts.

Starting from the red ball the light ray goes along the pink path intersecting the top mirror at (1). The ray changes direction because of the reflection rule that the incident and reflection angles are the same.

We have chosen a ray which turns straight down. This is depicted by the green path, which impinges upon the bottom mirror at point (2).

Applying the reflection rule we draw the outgoing ray (3) shown in blue. Light ray #1. The second ray is drawn most easily by employing symmetry arguments. The real image is located where the light ray paths intersect as shown below.
Light ray #1.
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