CHRIS MARTIN-BAHR / SCIENCE PHOTO LIBRARY CHRIS MARTIN-BAHR / SCIENCE PHOTO LIBRARY
Satellite dishes on appartment buildings. These dishes are used to send radio and microwave signals to and from satellites orbiting the Earth. The parabolic curve of the dish part of the antenna reflects incoming signals and focuses them at the receiver (black). Satellites and satellite dishes are crucial for telecommunications and are mainly used to receive satellite television. Photographed in Amsterdam, the Netherlands.
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