Vol. 16, issue 04, article # 2

Terent'ev Yu. I. Peculiarities of light diffraction at a screen with a straight edge at small values of screen thickness and density. // Atmospheric and oceanic optics. 2003. V. 16. No. 04. P. 283-287. PDF
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Abstract:

It was found experimentally that the relative light intensity considerably reduces in maxima and increases in minima of the diffraction pattern from an almost opaque screen with simultaneously growing illumination in the shadow region in the case of a decrease in the edge thickness or density of the screen substance down to small values.