Why are radio waves good for transmitting information long distances?

The radio waves good for transmitting information long distances is in advantage is that this method of communicating does not require wires to transmit information. ... Medium wavelength radio waves are reflected from the ionosphere, a layer of charged particles in the upper atmosphere, so they can be used for long distance communication.

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frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa