In physics and optics, the Fraunhofer lines are a set of spectral lines named after the German physicist Joseph von Fraunhofer (1787–1826). The lines were originally observed as dark features (absorption lines) in the optical spectrum of the Sun.
Famous quotes containing the word lines:
“[Children] do not yet lie to themselves and therefore have not entered upon that important tacit agreement which marks admission into the adult world, to wit, that I will respect your lies if you will agree to let mine alone. That unwritten contract is one of the clear dividing lines between the world of childhood and the world of adulthood.”
—Leontine Young (20th century)