廣播所用的無線電波,和光波相同,是一種電磁振動。無線電波和光波不同之處僅在於共振動頻率不同,也就是其波長不同,因為我們曉得頻率和波長之間有一簡單的關係:λf=c,式中λ——波長,f——頻率,c——傳播速度,在此即為光速。 Radio waves used for broadcasting, like light waves, are electromagnetic vibrations. The only difference between a radio wave and a light wave is the total frequency of the different vibration, that is, its wavelength is different because we know that there is a simple relationship between frequency and wavelength: λf = c, where λ - wavelength, f - frequency, c - Propagation speed, here is the speed of light.