OPTICS - DIFFRACTION - DIFFRACTION AROUND OBJECTS	Order
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Description: Hold a strand of hair (or we have a thin wire) in the laser beam and observe the diffraction. Quant. in Demo Room: 1 Demo References The Video Encyclopedia of Physics Demonstrations Disc 23-04 Place a .22 mm dia wire in a laser beam and measure the diameter by the diffraction pattern. Measurements can be taken from the video. The American Journal of Physics AJP 42(5),412 Use Babinet's principle to measure the diameter of a hair by the fringes. The American Journal of Physics AJP 45(4),404 Put a hair in a laser beam. The American Journal of Physics AJP 41(7),931 Put a straight pin in the laser beam.
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