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词汇 heaviside layer
词源
Heaviside layer. Increasing deafness forced Oliver Heaviside (1850–1925) to retire from his post with the British Great Northern Telegraph Company when he was only 24. The math- ematical physicist and electrician devoted the remainder of his long life to theoretical investigations into electricity. In 1902 he suggested that a conducting layer of ionized gas exists in the upper atmosphere that conducts, reflects, and refracts radio waves. This Heaviside layer, about 60 miles above us, reflects radio waves back to earth, and enables reception around the globe. Because Edison’s former assistant Arthur Edwin Kennel- ly (1861–1939) postulated the same theory shortly before the British scientist, the stratum is also called the Kennelly- Heaviside layer. Today it is more generally known as the iono- sphere. See appleton layer.
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更新时间:2025/5/1 10:18:55