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Robert Wilhelm Eberhard Bunsen (German:; 30 March 1811 [a] – 16 August 1899) was a German chemist. He investigated emission spectra of heated elements, and discovered caesium (in 1860) and rubidium (in 1861) with the physicist Gustav Kirchhoff. [11] The Bunsen–Kirchhoff Award for spectroscopy is named after Bunsen and Kirchhoff.
Spectroscope of Kirchhoff and Bunsen. The systematic attribution of spectra to chemical elements began in the 1860s with the work of German physicists Robert Bunsen and Gustav Kirchhoff, [30] who found that Fraunhofer lines correspond to emission spectral lines observed in laboratory light sources. This laid way for spectrochemical analysis in ...
In 1860, Robert Bunsen and Gustav Kirchhoff discovered the metallic element caesium in the mineral water from the Durkheim springs. For its seven mineral springs , Dürkheim was given the epithet Solbad (" brine bath"), and in 1904 it was given leave to change its name to Bad Dürkheim ( Bad is German for "bath", and a place may only bear this ...
This category is for historic maps showing all or part of Europe. See subcategories for smaller areas. "Historic maps" means maps made over seventy (70) years ago.
September 3–5 – Karlsruhe Congress, the first international meeting of chemists. Marcellin Berthelot rediscovers and names acetylene.; Robert Bunsen and Gustav Kirchhoff, using their newly improved spectroscope, discover and name caesium in mineral water from Bad Dürkheim, Germany.
Gustav Robert Kirchhoff (German: [ˈgʊs.taf ˈkɪʁçhɔf]; 12 March 1824 – 17 October 1887) was a German physicist, chemist and mathematican who contributed to the fundamental understanding of electrical circuits, spectroscopy and the emission of black-body radiation by heated objects.
Euratlas is a Switzerland-based software company dedicated to elaborate digital history maps of Europe. [1] Founded in 2001, Euratlas has created a collection of history maps of Europe from year 1 AD to year 2000 AD that present the evolution of every country from the Roman Empire [2] to present times.
In classical antiquity, Europe was assumed to cover the quarter of the globe north of the Mediterranean, an arrangement that was adhered to in medieval T and O maps. Ptolemy's world map of the 2nd century already had a reasonably precise description of southern and western Europe, but was unaware of particulars of northern and eastern Europe.