John Kerr FRS (17 December 1824 – 15 August 1907) wis a Scots physicist an a pioneer in the field o electro-optics. He is best kent for the discoverie o whit is nou cried the Kerr effect.[whit? clarification needit]

John Kerr (physicist)
John Kerr, c. 1860, photograph bi Thomas Annan
Born17 December 1824(1824-12-17)
Ardrossan, Scotland
Dee'd15 August 1907(1907-08-15) (aged 82)
Glesga, Scotland
Kent forKerr effect