Arun looks through pipes A, B, C, and D of different shapes to see a candle flame as shown below.
Through which pipe will he be able to see the candle flame clearly?
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Solution
In a medium, light always travels in a straight line. So, Arun can see the candle flame clearly when he looks through a straight pipe, as in option D.
In other cases, the light will get obstructed as the pipes are not straight.