Question

what is wave?How many types?

Answer 1

There are two basic types of wave motion for mechanical waves: longitudinal waves and transverse waves. The animations below demonstrate both types of wave and illustrate the difference between the motion of the wave and the motion of the particles in the medium through which the wave is travelling.

Answer 2

A wave is a disturbance that transfers energy through matter or space

there are mainly two types of wave
1)longitudinal wave
2)transverse wave