Tag: Optical

Optical Illusion Greeting Card

Tim received this optical illusion greeting card in 1999. It was a Christmas card from a friend who is a designer, and the designer had created this inverted perspective card, …
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Optical Pendulum

This unusual toy consists of a parabolic mirror with a small pendulum which hangs at the focal centre of the mirror. The Pendulum is spherical, and the front half is …
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