IN vol. lxxviii. of NATURE (May 21, 1908, p. 55) was published a note on “Secondary Waves of Light,” in which I described the diffraction effects produced by an obliquely held rectangular aperture or ...
IT has hitherto been held that, so long as the diffraction apertures used (cut in perfectly opaque or perfectly reflecting screens) are large compared with the wave-length of light, Fresnel's ...
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