Radio transmission in the 1.7-30 MHz frequency range worldwide. Like AM radio, shortwave signals reflect back from the ionosphere and follow the curvature of the earth. See amateur radio, AM radio and FM radio.
"shortwave radio." YourDictionary, n.d. Web. 25 May 2018. <http://www.yourdictionary.com/shortwave-radio>.
shortwave radio. (n.d.). Retrieved May 25th, 2018, from http://www.yourdictionary.com/shortwave-radio