Electromagnetic waves.
Wave
Light waves propagate best through vacuum, or "nothing." Light waves also propagate at slower speeds through denser materials, such as air, glass, and clear water.
Sound waves cannot propagate in vacuum. Air is needed for sound waves to travel and there is no air in vacuum.
seismic waves
Electromagnetic waves.
Wave
Light waves propagate best through vacuum, or "nothing." Light waves also propagate at slower speeds through denser materials, such as air, glass, and clear water.
Sound waves cannot propagate in vacuum. Air is needed for sound waves to travel and there is no air in vacuum.
seismic waves
Yes, sound waves propagate in water at a speed of 1497 meters per second at 25 degrees C.
Electron Magnetic Waves will propagate in the absence of matter
Sound waves.
Waves need a medium to propagate themselves through. The waves generated on a pond by a falling droplet need a medium, in this case its the very water of the pond. Sound waves can propagate both though a water medium or an air medium for example. Electromagnetic waves are an exception in that they do not need a medium to propagate through (the can propagate through the void of interstellar space).
Radio waves are not conducted. They propagate. They do not need a medium through which to propagate. They just move.
All sound waves, be that ultrasound or audible sound. Likewise water waves...
Electromagnetic waves propagate (move) with their own energy.