“The number of different optical phenomena has become in our time so great that caution must be taken so as to avoid being deceived, and also to refer the phenomena to the simple laws.”

— Joseph von Fraunhofer

In The Wave Theory, Light and Spectra. Prismatic and Diffraction Spectra. Memoirs by Joseph Von Fraunhofer (1981), p. 14 ISBN 0-405-13867-9

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Joseph von Fraunhofer7

German optical physicist 1787–1826

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“The number of different optical phenomena has become in our time so great that caution must be taken so as to avoid being deceived, and also to refer the phenomena to the simple laws.”

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Joseph von Fraunhofer7

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