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_12_variant_4
copyright Russell Kightley
Illustration size: 64.0 Mpixels (183 MB uncompressed) - 8000x8000 pixels (26.7x26.7 in / 67.7x67.7 cm at 300 ppi)