Two sources `S_1 and S_2` emitting light of wave length 600 nm are placed a distance `1.0x10^-2` cm apart. A detector can be moved on the litre line `S_1P` which is perpendicular to `S_1S_2`. a.What would be the minimum and maximum path differrence at the detector as it is moved alog the line `S_1P`? b. Locate the position of the farthest minimum detect.