Mechanical waves :A mechanical wave is a wave that is not capable of transmitting its energy through a vacuum.

Progressive: A progressive is a disturbance which carries energy without carrying matter

Wavelength is distance between corresponding points of two consecutive waves. Wavelength is usually denoted by the Greek letter lambda (λ)

Wave frequency is the number of waves that pass a fixed point in a second.The SI unit for wave frequency is the hertz (Hz).

The speed is the distance traveled by a given point on the wave (such as a crest) in a given interval of time. It is measured in m/s

The amplitude of a wave refers to the maximum amount of displacement of a particle on the medium from its rest position.

Phase: Wave phase is the offset of a wave from a given point. The point A and C are in phase.

The period of a wave is the time for a particle on a medium to make one complete vibrational cycle.

The return of light or sound waves from a surface is called reflection

The law of reflection states that the angle of incidence is equal to the angle of reflection.

Refraction of waves involves a change in the direction of waves as they pass from one medium to another.

Waves travel more slower in shallow water because the there is more pressure in the deep water which makes it easier to travel since there are more particles

Water wave diffraction is the phenomenon where waves encounter an obstacle or gap and propagate into a sheltered area at a different angle than the original wave train.

Wave interference is a phenomenon that occurs when two waves meet while traveling along the same medium. Interference effects can be observed with all types of waves.

When two waves of the same frequency and the same amplitude arrive at one point, they are superimposed, and their amplitudes are added giving rise to an "interference pattern. It is called constructive interference.

Destructive interference occurs when the crests of one wave overlap the troughs, or lowest points, of another wave.