Image of radio waves emanating from a transmission tower. Radio waves are electromagnetic waves that a created when charge is accelerated. This happens when the voltage across a transmitting aerial is varied.
Illustration ID: Radio-Waves-_4_8000
copyright Russell Kightley
Illustration size: 67.1 Mpixels (192 MB uncompressed) - 8192x8192 pixels (27.3x27.3 in / 69.4x69.4 cm at 300 ppi)