A plane light wave with wavelength ? = 0.60?m falls normally on a sufficiently large glass plate having a round recess on the opposite side (Fig. 5.2i). For the observation point P that recess corresponds to the first one and a half Fresnel zones. Find the depth h of the recess at which the intensity of light at the point P is
(c) Equal to the intensity of incident light.
This question was answered on: Jul 11, 2017
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