"Fraunhofer lines" Quotes from Famous Books
 ... of the spectrum. In this case, such absorption as the flame exerted upon the sunlight was more than atoned for by the radiation from the flame. When, however, the solar spectrum was rendered sufficiently intense, the bright bands vanished, and the two dark Fraunhofer lines appeared with much greater sharpness and distinctness than when the ...
— Six Lectures on Light - Delivered In The United States In 1872-1873 • John Tyndall |
