Uploaded April 2026 | Updated September 2026, 3 weeks ago

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In this series of six CHRISTMAS LECTURES, Professors John Meurig Thomas (1932-2020) and David Phillips (b.1939) explore the science and applications of crystals and lasers, reviving some of the key experiments from the history and evolution of physical sciences and exploring what the future might bring.

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This lecture was filmed at the Ri on Saturday 2nd January 1988.

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