2013年4月27日星期六

Guglielmo." Webster's New Planet Encylopedia. 1992.

For his pioneering do the job with wireless telegraphy, Italian electrical engineer Guglielmo Marconi is widely thought to be the father of radio. His experiments with sending wireless messages started using a distance of about one plus a half miles from destinations at his father's estate in Pontecchio in 1895 to in excess of 2,000 miles -from Cornwall, England to Newfoundland, Canada- just 6 many years later on. In 1909, the 35-year previous Marconi shared the Nobel Prize in Physics with German scientist Karl Braun. By then, handful of remembered or acknowledged the contributions with the late Russian physicist Alexander Popov.

Originally intending to follow his father's calling as being a priest, Popov enrolled within a seminary, but on graduating, turned his interest to scientific pursuits. Shortly soon after finishing his studies and a short teaching stint at Saint Petersburg University, Popov conducted investigation on electrical engineering in the Russian Navy's torpedo school at Kronstadt, inside the Gulf of Finland.

Throughout his tenure at Kronstadt wireless relay stations were established at his urging on Gogland Island inside the Gulf of Finland and at Kotka for the Finnish coast, and have been instrumental in securing support for your crews of two stranded ships in 1897. From 1901 until finally his death in 1906, Popov taught with the Imperial Institute of Electrical Engineering in Saint Petersburg.

5 years prior to Marconi patented his wireless telegraph in 1900, Popov had invented an instrument capable of detecting electromagnetic waves that indicated the presence of electrical discharges, specifically lightning, while in the atmosphere. The style and design of Popov's lightning detector was related to that of Marconi's wireless telegraph, but Popov's invention centered on getting rather than transmitting signals.

Both men had extrapolated upon the get the job done of earlier physicists, namely Heinrich Hertz and Oliver Lodge, but Popov's was the first to integrate an antenna. One more important discovery of Popov's came in 1897, when he identified that metallic objects could interfere together with the transmission of radio waves, a phenomenon recognized as wave reflection.

Marconi was as a great deal of a businessman as he was a scientist, founding his own telegraph corporation in 1897 and vigorously advertising his perform. Popov was a whole lot more concerned with investigation for its personal sake, rather than so much about making sure that he acquired appropriate credit score. This may likely clarify his subordinate historical part (Hebrew University). Popov in no way obtained a Nobel Prize, but was awarded the Grand Gold Medal with the Paris International Exposition of 1900.

For over 60 years, May seven has become celebrated in Russia as "Radio Day." The nationwide holiday was established in 1945 on the 50th anniversary of when Popov demonstrated his lightning detector to members within the Russian Physical and Chemical Society ninja 250 fairing kit. The next day, May possibly eight, 1945, is commemorated as VE (Victory in Europe) Day, when surrendered to Allied forces.

"Marconi, Guglielmo." Webster's New Planet Encylopedia. 1992.

"Popov, Alexander." Ibid.

"Marconi, Guglielmo." The Dictionary of Cultural Literacy. 2nd Edition. 1993.

"Guglielmo Marconi." Nobel Lectures, Physics 1901-1921. Elsevier Publishing Co.:
Amsterdam, 1967.

"Alexander Stepanovich Popov." Institute of Chemistry. The Hebrew University of Jerusalem.
three Oct. 2007

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