Radio wave
= Radio wave
{wiki}
A <radio wave> is <electromagnetic radiation> in the radio portion of the <frequency spectrum>. In vacuum its <frequency> and <wavelength> obey the <vacuum frequency-wavelength relation>.
= Radio wave
{wiki}
A <radio wave> is <electromagnetic radiation> in the radio portion of the <frequency spectrum>. In vacuum its <frequency> and <wavelength> obey the <vacuum frequency-wavelength relation>.