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_13b_11
copyright Russell Kightley
Illustration size: 40.0 Mpixels (114 MB uncompressed) - 6323x6323 pixels (21.1x21.1 in / 53.5x53.5 cm at 300 ppi)