Young and the wave theory of light

Lawrence Bragg discusses and demonstrates the competing theories of light.

Lawrence Bragg begins by outlining the two contesting theories of light held in the eighteenth century: the particles theory and the wave theory. This he follows with a description and demonstration of Thomas Young’s famous pinhole experiment; an experiment that validated the wave theory. Bragg then turns to diffraction, showing its effects with the use of Young’s original wave trough of 1800 and explaining interference fringes through a series of fascinating demonstrations.


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