Question

The two coherent sources of equal
intensity produce maximum intensity of
100 units at a point. If the intensity of one
of the sources is reduced by 50% by
reducing its width then the intensity of
light at the same point will be
(1) 90 (2) 89 (3) 67 (4) 72.85
of interference​

Answer 1

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Correct option is (4) 72.85