Question: A long narrow horizontal opaque rectangular object of width 0.70 mm is illuminated by 600-nm light. Consider a point-P, at the level of the lower

A long narrow horizontal opaque rectangular object of width 0.70 mm is illuminated by 600-nm light. Consider a point-P, at the level of the lower edge of the object, 1.0 m from it. Determine the ratio of the irradiance at P with and without the obstacle in place.

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