Radio waves emanating from a transmission tower. Radio waves are electromagnetic waves that are created when charge is accelerated. This happens when the voltage across a transmitting aerial is varied.
Illustration ID: Radio_Waves_11_variant_1
copyright Russell Kightley
Illustration size: 144.0 Mpixels (412 MB uncompressed) - 12000x12000 pixels (40x40 in / 101.6x101.6 cm at 300 ppi)