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Parabolic reflector – Wikipedia, the free encyclopedia.

…”Parabolic reflectors are popular for use in creating optical illusions. These consist of two opposing parabolic mirrors, with an opening in the center of the top mirror. When an object is placed on the bottom mirror, the mirrors create a real image, which is a virtually identical copy of the original that appears in the opening. The quality of the image is dependent upon the precision of the optics. Some such illusions are manufactured to tolerances of millionths of an inch.”…

NOW I’M GETTING SOMEWHERE WITH OPTICAL ILLUSIONS 🙂

VIRTUAL OR REAL – 2B or NOT 2B

CRITICAL QUESTION INDEED.