Firstly, long wavelengths are used in the carrier waves. These are affected less by everyday matter, and are good at spreading out. They can reflect, but they aren't distorted or diffracted much.
That's all the physics involved. It's good enough for a radio to work. Fortunately the format of rad...
A question which has a half-physics, half-computer answer. Yay!
there probably are other reasons behind the radio wave thing
@ManishEarth you and I both jumped on that question. It's a good one.
And you must have the most screwed up sleep schedule ever. I swear we're always online at the same time even though we're on different sides of the Earth.
