Radio wave is an electromagnetic wave ; what is an electromagnetic wave?? An electromagnetic wave are waves that does not require material medium for their propagation... So radio wave can move through a vacuum because it's an electromagnetic radiation...
Sound wave is a mechanical wave ; what is a mechanical wave?? Waves that require material medium for their propagation.. Other examples include :water wave,
Light wave is also an electromagnetic wave(radiation) it does not require a material medium for its propagation it defines every other electromagnetic wave other example including... ; gamma ray, X-ray, ultraviolet ray, visible light, infrared Ray, radio wave(which I discussed first)
Sound wave can not move through a vacuum because it requires a material medium.. You can talk to someone and the person hears you because the air particles serves as the material medium....
ADC should measure to 115 degrees if both measurements are equal to 180 degrees. If not, ADC might be 25 degrees if both measurements are equal to 90 degrees. Hope this helps.
