Three rectangular mirror strips (Plain 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 longer than the prism. This circular tube is now closed at one end with a cardboard disc.
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Three rectangular mirror strips (Plain 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 longer than the prism. This circular tube is now closed at one end with a cardboard disc.
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