Question: A long horizontal narrow slit of width 0.70 mm is illuminated with 600-nm light. A point-P, 1.0 m away from the aperture screen, is opposite

A long horizontal narrow slit of width 0.70 mm is illuminated with 600-nm light. A point-P, 1.0 m away from the aperture screen, is opposite the lower edge of the screen. If 100 W/marrives at P with no screen in place, determine the approximate irradiance there when the light passes through the slit. Use the Cornu spiral.

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