MHT CET 2025 Physics question
In Young's double slit interference experiment, using two coherent sources of different amplitudes, the intensity ratio between bright to dark fringes is 5 : 1. The value of the ratio of resultant amplitudes of bright fringe to dark fringe is
Answer: (B)
Solution
The intensity of a wave is proportional to the square of its resultant amplitude. At a bright fringe the resultant amplitude is and at a dark fringe it is , so . Taking the square root, the ratio of resultant amplitudes is
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