- Messages
- 158
- Reaction score
- 55
- Points
- 38
if by displacement you mean amplitude , then the amplitube was 20mm . A traveled 80mm in one complete oscillation ( 1 oscillation = max position to min and then back to max position = 4 amplitude)No it wasn't 20mm a wavelength has a crest and a trough only, so it displaces from equilibrium twice only, hence 80mm / 2 not 4.
mean to crest = 1st amp
crest to mean = 2nd amp
mean to tough = 3rd amp
trough to mean = 4th amp
TDT = 4 amps