Question

State the principle of working of a kalidoscope

Answer 1

Three rectangular mirror strips of dimensions 15cm×4cm (l×b) are joined together to form a prism.This prism is fixed into a circular cardboard tube.The circular cardboard tube should be slightly long the prism.The circular tube,is now closed at one end with a cardboard disc.The disc has a small hole in it through which we can see.At the other end of the circular tube,a plane glass plate is fixed.It is important that this glass plate touches the prism mirror.On this glass plate,several small and broken pieces of coloured glass plate allowing enough space for the coloured glass pieces to move.

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