Question

(2) Why can't we see the flame of a candle when we shift one of the cardboards?
Ans​

Answer 1

Answer:

1)According to FERMAT'S PRINCIPLE, light takes the path that takes the minimum time to traverse. ... 5)Then move any one of the cardboard slightly from it's postition and then you will see that you can't observe the light that was earlier visible as the 3 holes were not in straight line now.

Answer 2

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