Mobile phone mast seen behind a building. Mobile telephones send and receive voice,text and image data as low-intensity microwaves. The signals are relayed through a network of antennas that are mounted on masts. The masts are typically 15 metres high with antennas that have a range of a few hundred metres in urban areas. Hundreds of masts and smaller antennas are required to provide uninterrupted coverage across a network. There are concerns about the effects on humans of microwave radiation from mobile phones and antennas. Photographed in Andalucia,Spain,in October 2004 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Dominguez, Carlos |
Bildgröße: | 4090 px × 4289 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |