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Assertion (A) : When tiny circular obstacle is placed in the path of light from some distance, a bright spot is seen at the center of the shadow of the obstacle. Reason (R ) : Destructive interference occurs at the centre of the shadow.A. (a) If both the assertion and reason are true and reason explains the assertion assertion.B. (b) If both assertion and reason are true but reason does not explain the assertionC. (c) If assertion is true but reason is false.D. (d) If assertion is false but reason is true.

Answer» Correct Answer - C
As the waves diffracted from the edges of circular obstacle, placed in the path of light interfere constructively at the centre of the shadow resulting in the formation of bright spot.


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