question_answer

A and B are two points on a water surface where waves are generated. What is the phase difference if (a) A and B are on the same wavefront but separated in distance by the wavelength \[\lambda \]. (b) If A and B are on successive crests, but linearly separated by the distance \[2.5\lambda \] and (c) A and B are on successive troughs?

Answer:

                (a) Zero (b) \[2\pi \] (c) \[2\pi \].