Once the radio waves go out of a radio transceiver, they can go a short way to a home nearby or a hundred miles apart, or due to radio propagation they can travel around the globe, but how can this be, if the globe is round and waves would be lost further the horizon.
Well
radio waves journey can go straight up to the atmosphere and there meet the beauty of one of her layers, the
ionosphere, who acts as a mirror due to the
ions provided by the sun, kiss her goodbye and come back to earth a thousand miles apart from their origin.