Radio: Difference between revisions
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https://upload.wikimedia.org/wikipedia/commons/thumb/f/f1/EM_spectrum.svg/1280px-EM_spectrum.svg.png | https://upload.wikimedia.org/wikipedia/commons/thumb/f/f1/EM_spectrum.svg/1280px-EM_spectrum.svg.png | ||
https://sslimgs.xkcd.com/comics/electromagnetic_spectrum.png | https://sslimgs.xkcd.com/comics/electromagnetic_spectrum.png | ||
=== la lunghezza d'onda e la frequenza === | |||
http://www.cpdm-td.unina.it/ud/rappresentazione_e_analisi_dei_suoni/INTRODUZIONE_file/image003.gif | |||
=== atmosfera === | === atmosfera === | ||
Revision as of 15:12, 3 July 2015
Lo spettro elettromagnetico
la lunghezza d'onda e la frequenza
atmosfera
Lo spettro radio
| Band Number | Symbols | Frequency Range | Wavelength Range† |
|---|---|---|---|
| 4 | VLF | 3 to 30 kHz | 10 to 100 km |
| 5 | LF | 30 to 300 kHz | 1 to 10 km |
| 6 | MF | 300 to 3000 kHz | 100 to 1000 m |
| 7 | HF | 3 to 30 MHz | 10 to 100 m |
| 8 | VHF | 30 to 300 MHz | 1 to 10 m |
| 9 | UHF | 300 to 3000 MHz | 10 to 100 cm |
| 10 | SHF | 3 to 30 GHz | 1 to 10 cm |
| 11 | EHF | 30 to 300 GHz | 1 to 10 mm |
| 12 | THF | 300 to 3000 GHz | 0.1 to 1 mm |