Lawrence Bragg first compares naturally and artificially produced plastics and describes their structure. Demonstrations illustrate how simple molecules, by chemical reaction, are transformed into macro-molecules. This section of the film concludes with an experiment showing the manufacture of plastic. The construction of rubber is then described, its nature being illustrated both experimentally and with the aid of models.
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Full list of Properties of Matter films
Young and the wave theory of light
Reflection, refraction and polarization of light