Why can a wave travel through a medium?

Answer 1

Wave is form of kinetic energy transfer through medium in propagation - oscillation manner. Water wave is the continue motion of water and sound wave is through air. The electron motion in A/C is the motion of free electron transfer through the next electron to the use point.

Exception of wave that doesn't require medium is light wave, however, if it consider space as ether then the light wave also travel through the ether as medium.

Answer 2

The medium affects the wavelength and velocity of the wave.

Answer 3

yes, a mechanical wave needs a medium to move through and a electromagnetic wave doesn't need a medium

Answer 4

A mechanical wave is all about atoms transmitting forces to other atoms; this means that atoms are required.