Question

How is the phenomenon of reflection used in making a kaleidoscope? What are the applications of a kaleidoscope?

Answer 1

Kaleidoscope is a cylinder with three mirrors containing loose, coloured objects such as beads or pebbles and bits of glass. As the viewer looks into one end, light entering the other end, creates a colourful pattern due to reflection.

It works on the principle of multiple reflection, where several mirrors are placed at an angle (usually 60°) to one another. Typically, these are three rectangular mirrors set at 60° to each other so that they form an equilateral triangle.

The 60° angle creates seven duplicate images of the objects, 5 at 60° and 2 at 90°. As the tube is rotated, the tumbling of the coloured objects present varying colours and patterns.
Its applications are given below :

1. It is used for decoration purposes, toys, etc.
2. Kaleidoscope is also useful for designers and artists to get idea for new patterns to design wallpapers, jwellery and fabrics.