| | 38 | || '''04.12.2015''' || '''Dietrich Lemke''' || '''Dark lines in the spectrum of the sun'''[[BR]][[BR]]200 years ago, Joseph Fraunhofer discovered the dark lines in the spectrum of the sun and other stars during his stay in Benediktbeuern Abbey. Henceforth, he made use of them in manufacturing better lenses for his famous refractive telescopes. Only forty years later, Robert Bunsen and Gustav Kirchhoff, both in Heidelberg, revealed the physical nature of the Fraunhofer lines as the finger prints of the chemical elements in the sun. During the same time, the red or blue shift of those lines as caused by the movement of cosmic sources away from or towards us by the effect named after Christian Doppler has been discovered. This initiated the astrophysical conquest of the Universe, which is the basis of our modern view of the world.[[BR]][[BR]]Please join Dietrich Lemke on a historical journey (also) to the origins of principal astronomical techniques.[[BR]][[BR]]Presentation: German [[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/WikiStart/2015-12-04_Spektroskopie.pdf Slides: German][[BR]]Questions: German, English || |
