Acoustics

SPEED
Difference waves travel at different speeds. waves on the sea are low compared to the speed of sound. sound travels 330 meters every second. But the radio waves travel at the speed of light. (300.000 kilometres per second) 

FREQUENCY
Is the number of waves that pass a point per second. This is measured in Hertz. 

WAVELENGTH
Is the distance between matching points on a wave. 

LONGITUDINAL
Longitudinal waves vibrate parallel to the direction of travel of the wave. Sound waves are longitudinal. 

TRANSVERSE
Transverse waves vibrate at right angles to the directions of travels of the wave.

