FYI, Radio waves /= (do not equal) sound waves.
Radio waves are part of the EM spectrum, which includes Gamma Rays, X-Rays, Infra-Red, Radio, Light, Microwaves etc.
There's no "distortion" but there is a difference in the reflective, absorption, scattering and interference properties between Radio and Light (visible or otherwise) Radiation.
Also light speed is a constant (although this is in debate) - and thus all electromagnetic waves, whether they are light or radio or x-ray in nature (the names merely refer to the frequency of the EM wave) - all of them travel the same speed...
So today is your lucky day, you have in fact learnt two things. :sorcerer: