Joseph von Fraunhofer, German physicist, c 1820s.

 
Joseph von Fraunhofer, German physicist, c 1820s.
4 0 c m
 
33cm
actual image size: 25cm x 32cm

Description

Joseph von Fraunhofer (1787-1826) founded an optical institute at Munich in 1807. His improvements to prisms and telescopes enabled him to discover dark lines in the sun's spectrum, called Fraunhofer's lines.

© Science Museum / Science & Society Picture Library

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