Optics. Fraungofer

you are: Optics

By means of the spectroscope constructed by it with a narrow crack of Fraungofer has opened dark lines of absorption in the Sun spectrum (a line of Fraungofera). Thanks to their comparison with lines of century a spectrum of other light sources, he has specified values of lengths of light waves.

In the last years of life by it have been made difraktsionnye lattices by drawing on the gilt glass of 300 most thin strokes on a piece of 1 mm where he observed the diffraction phenomenon. Further lattices of Fraungofera were used for measurement of length of light waves.

These opening have led to a birth of new area of physics - spectroscopy. Accuracy of its measurements all time raised, and atlases of spectra of radiation of many chemical elements eventually have been created. This data has appeared invaluable to identification of various elements in materials of unknown structure and has laid down, thus, in a basis of a new method of the chemical analysis.

At the same time the phenomenon linejchatyh spectra was exclusively mysterious. Why atoms should let out radiation with certain length of a wave? Obviously, this radiation should bear the information on structure of atoms. However should pass almost century before it was possible to understand an origin linejchatyh spectra.