Check sibling questions
  1. Place a candle on one end of the room and take a rubber tube.
  2. Stand on the other end of the room and view this candle with the help of the tube.
  3. Bend the pipe a little and then try to see the candle.

It will be observed that we are able to see the candle using a straight tube , but when the tube is bent, the candle is not visible.

This shows that light travels only in straight lines. 

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Economics, Accounting and English at Teachoo