"So, basically, shortwave radio signals are able to travel far and have a very long range. It is known that shortwave radio signals are even able to bounce off surfaces or reflect on the water. That is why these signals can even last and travel forever!"
https://www.radiopicker.com/how-far-can-shortwave-radios-travel/
"Many large stations use extreme high power for shortwave broadcasting. Your local AM station may use up to 50,000 watts of broadcasting power. A shortwave broadcasting station may use 1,000,000 watts for each of their stations and very directive antenna arrays! You hear it all in real time with no internet delays or shutdowns!"
https://hamuniverse.com/shortwave.html
"The Sun is the brightest source of radio waves in the sky."
http://solar.physics.montana.edu/YPOP/Spotlight/Today/microwave.html
"antenna (an electrical device which converts electric radio waves into current – i.e. an infinitely free power supply)"
https://www.apparentlyapparel.com/news/nikola-teslas-wireless-electric-automobile-explained
"Tesla would fool with some tuners and tune in the right frequency and got 240 volts delivered through the air"
https://waterpoweredcar.com/teslascar.html
"The receiver, no larger than a short-wave radio of the day"
https://www.lifehacker.com.au/2019/06/the-mystery-of-nikola-teslas-battery-free-electric-car/
"its power from the ether just like an automobile antenna picks up radio waves from the ether."
https://teslauniverse.com/nikola-tesla/articles/nikola-teslas-most-amazing-pierce-arrow-car-project-1931-buffalo-ny-vision
"the radio waves that come from a radio station are two types of electromagnetic radiation. The other types of EM radiation that make up the electromagnetic spectrum are microwaves, infrared light, ultraviolet light, X-rays and gamma-rays."
https://imagine.gsfc.nasa.gov/science/toolbox/emspectrum1.html
"wave is generated by a transmitter and then detected by a receiver. An antenna allows a radio transmitter to send energy into space and a receiver to pick up energy from space. Transmitters and receivers are typically designed to operate over a limited range of frequencies."
https://www.nasa.gov/directorates/heo/scan/communications/outreach/funfacts/what_are_radio_waves
"Radio waves have the longest wavelengths and lowest frequencies in the electromagnetic spectrum."
https://www.physics-and-radio-electronics.com/physics/electromagnetic-spectrum/radio-waves.html