properties of waves
AMPLITUDE- the height of the wave measured in meters
-which correspond to loudness for a sound wave or brightness for a light wave
WAVELENGTH-the distance between adjacent crest
PERIOD- the time it takes for one complete wave to pass a given point, mesured in seconds
FREQUENCY- the number of complete waves that pass a point in one second,measured in inverse second
SPEED- horizontal speed of a point on a wave as it propagates,