a) Types of waves

a) progressive waves; longitudinal and transverse waves

e) graphical representations of transverse and longitudinal waves

progressive wave = a wave that transfers energy without transferring matter

transverse wave = a wave where the particle vibrations are perpendicular to the direction of energy transfer

• peak = the maximum upwards displacement from the rest position

• trough = the maximum downwards displacement from the rest position

longitudinal wave = a wave where the particle vibrations are parallel to the direction of energy transfer

• compression = the region of highest pressure due to particles being close together

• rarefaction = the region of lowest pressure due to particles being far apart