John Kerr FRS (; 17 December 1824 - 15 August 1907) was a Scottish physicist and a pioneer in the field of electro-optics. He is best known for the discovery of what is now called the Kerr effect.

Life and work

John Kerr was born on 17 December 1824 in Ardrossan, Scotland. He was a student in Glasgow from 1841 to 1846, and

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