See this image gallery, by C. C. Jones of Union College, for examples of physical optics and also x-ray diffraction. Several images of diffraction show how the pattern changes when the wavelength, the distance between light sources, and the aperture is varied. Also, you'll find pinhole photos and comparisons of emission spectra of various elements and the absorption spectrum of the sun.
%0 Electronic Source %D April 26, 2005 %T C. C. Jones: Scientific Photographs %V 2014 %N 26 November 2014 %8 April 26, 2005 %9 image/jpeg %U http://minerva.union.edu/jonesc/scientific_photos%202010.htm
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