Answer Happy

kindly provide proper explanation with all details for each step and each options. correct answer is B C
Q.5 Three coherent sources producing plane wave fronts towards right of same amplitude and wavelength (31) are situated on a line as shown in the diagram. If an observer P also lies on the same line and observes no light when sources S1, S2 and Sz are switched on simultaneously. Taking all suitable approximations and d; & d, <<<D. S S2 S3 P d d2 Rate this question Answer di must be 32. di may be a da may be 42 d, must be