Question

what is kaleidoscope side and angle​

Answer 1

Answer:

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A simple kaleidoscope consists of two thin, wedge-shaped mirror strips touching along a common edge or of a single sheet of bright aluminum bent to an angle of 60° or 45°. The mirrors are enclosed in a tube with a viewing eyehole at one end.

Answer 2

Answer:

Polycentral Kaleidoscope" with three reflectors at angles of 90°, 60° and 30°: the pattern with 31 reflected images of the aperture