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Question

Arun looks through pipes A, B, C, and D of different shapes to see a candle flame as shown in figure.


Which pipe will he be able to see the candle flame clearly?


A
C
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B
B
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C
D
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D
A
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Solution

The correct option is C D
Light always travels in a straight line in a medium. So, Arun can see the candle flame clearly when he looks through the straight pipe.
In other cases, the light will get obstructed as the pipes are not straight.

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