Radiodiffusion
From Wikipedia, the free encyclopedia
Radiodiffusion[1] (etiam note simplmente como radio, ab latino radius "barra del rota, radio de lumine") esse le transmission de signales de modulation de undas electromagnetic con frequentias sub illos del lumine visibile.[2] Radio o radiotelegraphia esseva nominate al initio "telegraphia sin filo". Le radiation electromagnetic propoga per campos electromagnetic que pote transversar le aere e le vacuo spatial. Information pote esser transmittite per modular systematicamente alcun characteristica del undas radiate: pro exemplo, amplitude, frequentia, phase, o grandor del pulso. Quando undas radio pasa un conductor electric, le campos undulante induce un currente electric in le conductor. Le processo de demodulation esse le detection e le transformation del radios a sono o altere signalos.
Radiodiffusion |
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instantia de: product distribution method[*], type of mass media[*], academic major[*], economic activity[*] |
subclasse de: radiocommunication service[*], programming and broadcasting activities[*], public disclosing[*] |
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Commons: Broadcasting |
Stationes radio usa le propagation de undas radio pro transmitter programmas sonic; iste radios usualmente usa modulation de amplitude o modulation de frequentia. Le parola radiodiffusion esse le nomine del transmission. Television etiam usa undas radio pro transmitter le video e le sono de un programma.