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Answer the following questions: (c) Wh...

Answer the following questions:
(c) When a tiny circular obstacle is placed in the path of light from a distant source, a bright spot is seen at the centre of the shadow of the obstacle. Explain why?

Text Solution

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When a tiny circular small disc is placed in the path of light from a distant souce, a bright spot is seen at the centre of the shadow of the disc because, wave diffracted from the edge of the circurlar disc interface constructively at the centre of the shadow, which produces bright spot.
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