Abstract
In Strasbourg, Mandelstam conducted research in radio-engineering and optics. By working in radio-engineering, he followed F. Braun and he was involved in the mainstream of research which was conducted at Strasbourg Institute of Physics, the institute which was headed by F. Braun. As was noted above with reference to the biography of F. Braun written by F. Haas, since 1901 all the dissertations supervised by Braun had been dedicated to wireless telegraphy.
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Notes
- 1.
Compare with the enthusiastic estimation of Mandelstam’s degree work in the Soviet 1951 book [349, p. 196].
- 2.
For M. Wien’s papers, see [381, 382].
- 3.
Vilhelm Bjerknes (1862–1951) was Assistant to H. Hertz in 1890–91. The concept of the extremely loose coupling he mainly developed in 1895–1898. He became a famous earth physicist and meteorologist later.
- 4.
L.I. Mandelstam mentioned the principle of the Wien transmitter in his lectures on the theory of oscillations [1, vol. 4, p. 279; 2, p. 256]. “Wien invented a very small spark gap, Mandelstam said. When the breakdown happens in it, it is becoming a conductor. However, under certain conditions the spark gap is losing its conductivity if the current is small. Then, the first circuit is automatically disconnected, when the amplitude of its oscillations is becoming very small, and back energy transfer does not take place”.
- 5.
AEG—Allgemeine Electricität Gesellschaft.
- 6.
Lee de Forest was the American radio-engineer and entrepreneur. Having improved the diode invented by Fleming, Forest took out a patent for triode, a three element device. Forest contributed a lot to the development of radio in USA (see, for example, [6]).
- 7.
J.A. Stone was the English radio-engineer who contributed to the construction of the transmitter.
- 8.
Uller published a number of articles on the propagation of radio waves.
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Pechenkin, A. (2019). The Strasbourg Period: Radio-engineering. In: L.I. Mandelstam and His School in Physics. Springer, Cham. https://doi.org/10.1007/978-3-030-17685-3_3
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