Wo isotropic point sources of light s1 and s2 are separated by a distance of 2.70 m along the y-axis (i. e. s1 is located at x=y=0 and s2 at x=0, y=2.70 m) and emit in phase at wavelenght 900 nm and at the same amplitude. a light detector is located at a point p with coordinate xp on the x-axis. what is the greatest value of xp at which the detected light is minimum due to destructive interference?