Their working method is similar to the one of mirrors, but they display a reflection. The most basic kaleidoscope is made of two mirrors and a 30-degree wedge. Holding the kaleidoscope differently will change the wedge’s position and the light will hit the mirrors under a different angle. This causes a variety of colors and geometrical shapes. Keep in mind that kaleidoscopes are complicated device and the above explanation is as simple as possible.
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