Copyright (1997) American Association of Physics Teachers. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Association of Physics Teachers.
The following article appeared in F. J. Duarte, Interference, diffraction, and refraction, via Dirac's notation, Am. J. Phys. 65, 637-640 (1997) and may be found at http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=AJPIAS000065000007000637000001&idtype=cvips&gifs=Yes
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Page published on the 13th of September, 2009
Last updated on the 16th of February, 2015