March 6, 1787 (17 DingWei the first month), German physicist Joseph von Fraunhofer was born. The Fraunhofer spectrum

sun. Fraunhofer spectral lines in the solar spectrum, and pointed out that the atmospheric water vapor absorption lines. The the Fraunhofer spectrum (Chinese mainland translated Cardiff Lang and fee line) is a series of German physicist Joseph von Fraunhofer (1787 -1826), the name of spectral lines, these initially as a the Fraunhofer spectral line of the sun in the solar spectrum.