Eduprobe
Question:
Two coherent point sources S1 and S2 are separated by a small distance d as shown. The fringes obtained on the screen will be: straight lines, semi-circles, concentric circles, points
straight lines
concentric circles
points
semi-circles
Solution:
for a given path difference many points can be found on the screen and locus of all these points are semicircles. hence, fringes will be in concentric circle forms.