7.1 Progressive waves

1 describe what is meant by wave motion as illustrated by vibration in ropes, springs and ripple tanks
2 understand and use the terms displacement, amplitude, phase difference, period, frequency, wavelength
and speed
3 understand the use of the time-base and y-gain of a cathode-ray oscilloscope (CRO) to determine
frequency and amplitude
4 derive, using the definitions of speed, frequency and wavelength, the wave equation v = f λ
5 recall and use v = f λ
6 understand that energy is transferred by a progressive wave
7 recall and use intensity = power/area and intensity ∝ (amplitude)
2
for a progressive wave