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By University Distinguished Professor of Sciences and Humanities Jagdish Mehra
The Golden Age of Theoretical Physics brings jointly 37 chosen essays. lots of those essays have been first awarded as lectures at quite a few universities in Europe and the us, after which released as stories or articles. Their enlarged, ultimate models have been released within the joint paintings of Jagdish Mehra and Helmut Rechenberg, The old improvement of Quantum conception, whereas the opposite essays have been released as articles in medical journals or in edited books. the following they're released jointly as a tribute to the Mehra-Rechenberg collaboration sustained for a number of many years, and canopy quite a few elements of quantum concept, the precise and basic theories of relativity, the rules of statistical mechanics, and a few in their basic purposes. essays, 'Albert Einstein's ''First'' Paper' (Essay 1) and 'The Dream of Leonardo da Vinci' (Essay 37), lie open air the most important subject matters taken care of during this booklet, yet are integrated right here due to their old curiosity. The starting place of every essay is defined in a footnote.
This ebook offers with crucial topics constructed within the first forty years of the 20 th century via many of the maximum pioneers and designers of recent physics. it's a important resource of data approximately what can assuredly be defined as 'the golden age of theoretical physics'.
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After his marriage to Mathilde Levy at Basle in 1888, Casar went to Buenos Aires; following a sojourn there and return to Basle, he settled in Antwerp, Belgium, around 1891, and moved to Brussels after the First World War. He was a merchant of commodities. Casar Koch was very fond of Albert Einstein and encouraged him in his boyhood studies. Einstein visited the Koch family when he attended the first Solvay conference in Brussels in 1911. In the 1920's when Einstein used to visit Ehrenfest in Leiden and gave lectures there, or en route to Paris from Berlin, he always visited his uncle Casar.
Thus, Samuel Pierpont Langley extended the range of observable heat radiation to include wavelengths of one-millionth of a metre by his bolometer method (Langley, 1886) and Heinrich Hertz demonstrated the existence of electromagnetic waves emitted by oscillating currents in open circuits, having wavelengths of the order of a metre (Hertz, 1888a). On the other hand, the electromagnetic spectrum was also extended on the ultraviolet side to shorter and shorter wavelengths, especially through the discovery of X-rays and of 7-radiation from radioactive substances, which took place shortly before the end of the nineteenth century and in the beginning of the twentieth century, respectively.
Mit schwerem Herzen drange ich dieselben in einen Aufsatz zusammen, der eher wie ein Programm als wie eine Abhandlung aussieht. Weil es mir aber vollstandig an Material fehlte, um tiefer in die Sache eindringen zu konnen, als es das blosse Nachdenken gestattete, so bitte ich, mir diesen Umstand nicht als Oberflachlichkeit auszulegen. Moge die Nachsicht des geneigten Lesers den bescheidnen Gefiihlen entsprechen, mit denen ich ihm diese Zeilen iibergebe. Der elektrische Strom setzt bei seinem Entstehen den umliegenden Ather in irgend eine, bisher ihrem Wesen nach noch nicht sicher bestimmte, momentane Bewegung.