Demonstrations of the science and application of light's refractive properties.
An explanation of double refraction is followed by Lawrence Bragg demonstrating its effects by means of Polaroid, a crystal of calcite and a lamp incorporating an iris diaphragm. The effects that are associated with the scattering of light are then described, each description being supplemented by a demonstration. He ends with a series of experiments in refraction effects using two pieces of Polaroid.
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