Waves

Regular,repetitive to and fro up and down motion

Caused by a continuous series of pulses or vibrations

Vibrating perfectly in step with one another i.e. if they are moving in the same direction and of the same distance away from rest position

The distance between two consecutive points which are in phase

The number of complete waves passing a point in one second

F =1/T

The amount of time taken for one complete wave to pass a point

T=1/f

The distance moved by any pulse and a wave in one second

V=🔺x/t

V=f x lambda

Maximum displacement from the position of rest

A wave in which the particles of the medium vibrate at 90° to the direction in which the wave moves

A wave in which the particles of a medium vibrate parallel to the direction in which the waves move

The maximum displacement above position of rest

The maximum position or displacement below rest position

Point at which there is no displacement

Area where particles are close together in a longitudinal wave

An area where particles are far apart and a longitudinal wave

Measured from the centre of the compression to the centre of the next compression or from the centre of the rare faction to the centre of the next rare faction

A single disturbance in a medium

Destructive interference occurs when a crest and trough meet this results in a smaller amplitude the first type of destructive interference is partial destructive interference when the weights have different amplitudes there is also total destructive interference when waves have the same attitude and they cancel each other out

When pulses cross the combine disturbance at any point is equal to the algebraic some of the disturbances

When two or more pulses interact with each other in the same space at the same time