Longitudinal wave.
AIR
Such a wave is called a longitudinal wave.
water travels as a transverse wave (meaning that the water molecules move in a direction perpendicular to the direction of the path of the wave. the molecules move up and down while the wave moves in horizontal direction).
The type of wave in which the matter in the wave moves in the same direction as the wave itself is called a longitudinal wave. In a longitudinal wave, the particles of the medium oscillate back and forth parallel to the direction of energy transport. This is in contrast to a transverse wave, where the particles oscillate perpendicular to the direction of energy transport. Sound waves are a common example of longitudinal waves.
When light moves from one kind of matter to another, it can be reflected, transmitted, or absorbed depending on the properties of the materials involved. The change in medium can also cause the light to change direction and/or speed, which is known as refraction. Additionally, the color and wavelength of the light may be affected by the interaction with the new material.
That sounds like the description of a transverse wave.
Light can not change direction by passing from one kind of mater to another. In fact, light can only pass through its own type of matter, which is when things like light can go through each other (and only a few types of matter can do that), but even in that case since it can go through, it can't be bent in angle by passing through.
In DC circuits the current travels only in one direction.
Sound travels through matter as transverse pressure waves.
Sound travels in longitudinal waves, which means that the particles of the medium move in the same direction as the wave is propagating. This is in contrast to transverse waves where the particles move perpendicular to the wave's direction.
A longitudinal wave is a type of wave that moves in the same direction as the wave's propagation. In a longitudinal wave, the particles of the medium oscillate parallel to the direction of the wave's motion. Sound waves in air are an example of longitudinal waves.
Alternating current is generated by a rotating generator which moves in such a way as to produce that kind of current.