The stading wave on a 5 m long string clamped at both ends is represented by the equation y=4sin6.28xcos6.28t, where y is in cm. The phase difference between two points at x=1.51m and x=2.75 m is
The stading wave on a 5 m long string clamped at both ends is represented by the equation y=4sin6.28xcos6.28t, where y is in cm. The phase difference between two points at x=1.51m and x=2.75 m is