Determine the optical path difference for the two waves A and B, both having vacuum wavelengths of 500 nm, depicted in Fig. P.7.6; the glass (n = 1.52) tank is filled with water (n = 1.33). If the waves start out in-phase and all the above numbers are exact, find their relative phase difference at the finishing line.

0.5 cm 10 cm Figure P.7.6 - 0.5 cm prss Start 100 cm Finish