Question

Prove with an activity that light travels in straight path.
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Answer 1

equation solved

the light travel only in straight path

Answer 2

Answer:

Fix a lighted candle on a table. Take a rubber tube, stretch it straight and look through it at the flame of the candle with one eye (keeping the other eye closed) [see Figure (a)]. We will find that when the rubber tube is straight, we can see the light of candle flame through it.

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