JEE Advanced 2020 Full Test 3 Paper 2

Sounds from two identical sources S1 and S2 reach a point P. when the sounds reach directly and in the same phase the intensity at P is I0. The power of S1 is now reduced by 64% and the phase difference between S1 and S2 is varied continuously the maximum and minimum intensities recorded at P are now Imax and Imin