Two waves of intensity ratio 1 : 9 cross each other at a point. The resultant intensities at the point, when (a) Waves are incoherent is I1 (b) Waves are coherent is I2 and differ in phase by 60°. . If I1/I2=10/x

                                                         JEE-2024         

Solution:                
Two waves of intensity ratio

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