CHRISTIAN KOCH, MICROCHEMICALS / SCIENCE PHOTO LIBRARY CHRISTIAN KOCH, MICROCHEMICALS / SCIENCE PHOTO LIBRARY
Diffraction experiment. Simulation showing the variation in the interference pattern produced by light waves passing through a multi-slit aperture. N is the number of slits and D is the distance between slits (2.2 micrometres). The wavelength of the light used here is 633 nanometres. The diffraction causes the light waves to overlap, causing constructive and destructive interference. The intensity of the light (red) is shown on a diffusing screen, and as a curve (white). In these nine images, N ranges from 2 (upper left) to 80 (lower right). As the number of slits increases, the interference maxima become progressively sharper.
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