Heinrich Hertz cytaty

Heinrich Rudolf Hertz – niemiecki fizyk żydowskiego pochodzenia, odkrywca fal elektromagnetycznych.

Heinrich Hertz studiował fizykę na Uniwersytecie w Berlinie. Przez trzy lata , był asystentem Helmholtza. W roku 1883 został prywatnym wykładowcą fizyki teoretycznej na Christian-Albrechts-Universität w Kilonii, a w latach 1885–1889 był profesorem fizyki w Wyższej Szkole Technicznej w Karlsruhe. Następnie objął posadę profesora fizyki na Uniwersytecie w Bonn.

Hertz po raz pierwszy wytworzył fale elektromagnetyczne posługując się skonstruowanym przez siebie oscylatorem elektrycznym . Stwierdził tożsamość fizyczną fal elektromagnetycznych i fal świetlnych oraz ich jednakową prędkość rozchodzenia się. Hertz stworzył podstawy rozwoju radiokomunikacji. Dla uczczenia tych osiągnięć jednostkę częstotliwości nazwano od jego nazwiska hercem .

Hertz zmarł po dwuletniej walce z ziarniniakiem Wegenera[potrzebny przypis]

. Został pochowany na cmentarzu Ohlsdorf w Hamburgu.

✵ 22. Luty 1857 – 1. Styczeń 1894
Heinrich Hertz Fotografia
Heinrich Hertz: 4   Cytaty 0   Polubień

Heinrich Hertz: Cytaty po angielsku

“The rigour of science requires that we distinguish well the undraped figure of Nature itself from the gay-coloured vesture with which we clothe her at our pleasure.”

As quoted by Ludwig Boltzmann in a letter to Nature (28 February 1895) http://books.google.com/books?id=PnUCAAAAIAAJ

“When a constant electric current flows along a cylindrical wire, its strength is the same at every part of the section of the wire. But if the current is variable, self-induction produces a deviation from this… induction opposes variations of the current in the centre of the wire more strongly than at the circumference, and consequently the current by preference flows along the outer portion of the wire. When the current changes its direction… this deviation increases rapidly with the rate of alternation; and when the current alternates many million times per second, almost the whole of the interior of the wire must, according to theory, appear free from current, and the flow must confine itself to the very skin of the wire. Now in such extreme cases… preference must be given to another conception of the matter which was first presented by Messrs. 0. Heaviside and J. H. Poynting, as the correct interpretation of Maxwell's equations as applied to this case. According to this view, the electric force which determines the current is not propagated in the wire itself, but under all circumstances penetrates from without into the wire, and spreads into the metal with comparative slowness and laws similar to those which govern changes of temperature in a conducting body.
…Inasmuch as I made use of electric waves in wires of exceedingly short period in my experiments on the propagation of electric force, it was natural to test by means of these the correctness of the conclusions deduced. As a matter of fact the theory was found to be confirmed by the experiments…”

"On the Propagation of Electric Waves by Means of Wires" (1889) Wiedemann's Annalen. 37 p. 395, & pp.160-161 of Electric Waves
Electric Waves: Being Researches on the Propagation of Electric Action with Finite Velocity Through Space (1893)

“If we wish to lend more color to the theory, there is nothing to prevent us from supplementing all this and aiding our powers of imagination by concrete representations of the various conceptions as to the nature of electric polarisation, the electric current, etc.”

Introduction, p. 28
Electric Waves: Being Researches on the Propagation of Electric Action with Finite Velocity Through Space (1893)
Kontekst: It is not particularly satisfactory to see equations set forth as direct results of observation and experiment, where we used to get long mathematical deductions as apparent proofs of them. Nevertheless, I believe that we cannot, without deceiving ourselves, extract much more from known facts than is asserted in the papers referred to. If we wish to lend more color to the theory, there is nothing to prevent us from supplementing all this and aiding our powers of imagination by concrete representations of the various conceptions as to the nature of electric polarisation, the electric current, etc.

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