Question

what is wave propagation.

Answer 1

Wave propagation is any of the ways in which waves travel.

With respect to the direction of the oscillationrelative to the propagation direction, we can distinguish between longitudinal wave and transverse waves.

For electromagnetic waves, propagation may occur in a vacuum as well as in a material medium. Other wave types cannot propagate through a vacuum and need a transmission medium to exist[citation needed].

Answer 2

wave propagation is any of the ways in which waves travel with respect to the direction of the oscillation relative to the propagation direction we can distinguish between longitudanal waves and transverse waves