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CBSE Class 8 Answered

What is a kaleidoscope? State the principle on which it is based.
Asked by gspublicschool | 05 Feb, 2019, 02:07: PM
Expert Answer

A kaleidoscope  is an optical instrument usually with three reflecting surfaces ( mirrors) tilted to each other in an angle so that it forms a triangle crosssection. Objects on one end of the mirrors are seen as a regular symmetrical pattern when viewed from the other end, due to repeated reflection.

The reflectors (or mirrors) are usually enclosed in a tube, often containing on one end a cell with loose, colored pieces of glass or other materials to be reflected into the viewed pattern. Rotation of the cell causes motion of the materials, resulting in an ever-changing view being presented.

 

when two mirrors are inclined to each other by an angle θ and an object is placed in between mirrors,  number of  images seen is (360/θ).
This is the basic principle behind the kaleidoscope
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