In 1894,Italian scientist Guglielmo Marconi (1874-1937) began experimenting with electromagnetic waves. Imitating Hertz,he experimented with waves concentrated by a curved reflector. This 1896 beam transmitter succeeded in sending signals more than two miles | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Science Source |
Taille de l’image : | 2551 px × 3301 px |
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