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.
Image Details
Image Ref.
10324082
© Science Museum / Science & Society Picture Library