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Question

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

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Solution

  • 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 reflections, where several mirrors are placed at an angle (usually 60 ) to one another. Typically, these are three rectangular mirrors set to 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 presents varying colours and patterns.
  • It is used for decoration purposes, toys, etc. It is also useful for designers and artists to get an idea for new patterns to design wallpapers, jewellery and fabrics.

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