John Kerr (physicist)
Life and work
In 1857, he was a mathematics teacher in Glasgow. In 1875, he discovered a change in the refractive index, which is caused by the application of an electric field to certain materials ( electro-optical Kerr effect).
In 1876, he discovered the rotation of the polarization plane of the light, which is reflected on the ferromagnetic metal surfaces. This is now known as magneto-optical Kerr effect.
On the basis of the electro-optical Kerr effect, he developed the Kerr cell.
- Physicist (19th Century )
- Member of the Royal Society
- Born in 1824
- Died in 1907