So I'm doing homework on superposition and polarisation and there's a question on phase difference/ path difference that i have no idea how to answer. These are the questions:
b) path differences give rise to phase differences. By how much do the following change the phase difference?
(i) 1 wavelength
(iii) 3 wavelength/4
c) What path differences would give the following phase differences?
(i) 90 degrees
(ii) 120 degrees
Any help would be great!!
Stick or dump?