Explain the construction of kaleidoscope

  1. Three rectangular mirror planes.
  2. Join them together to form a prism.
  3. Fix them in a circular cardboard tube or tube of a thick chart paper. (The tube must be slightly longer than the mirror strips)
  4. Close one end of the tube by a cardboard disc having a hole in the centre
  5. At the other end, touching the mirrors, fix a circular plane glass plate.
  6. Small pieces of coloured glass are placed in this glass plate
  7. Close this end of the tube by a ground glass plate.
  8. Allow enough space for the colour pieces to move around.

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