Friedrich Carl Alwin Pockels

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Friedrich Carl Alwin Pockels (1865 - 1913) was a German physicist. He was born in Italy to Captain Theodore Pockels and Alwine Becker. He obtained a doctorate from the University of Göttingen in 1888, and from 1900 to 1913 he was professor of theoretical physics at the University of Heidelberg.

In 1893 he discovered that a steady electric field applied to certain birefringent materials causes the refractive index to vary, approximately in proportion to the strength of the field. The coefficient of proportionality is of the order of 10-10 to 10-12 V-1. This phenomenon is now called the Pockels effect.

His sister Agnes Pockels (1862-1935) was also a physicist.

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