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State the conditions for constructive and destructive inter-ference of light. |
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Answer» For constructive interference: (a) Phase difference between any two waves should be integral multiple of `2pi`,i.e., `phi=2n pi,` where n = 0, 1, 2, …… (b) Path difference should be equal to `(lambda)/(2pi)` times of phase difference, i.e., `Delta=(lambda)/(2pi)xx`Phase difference `=(lambda)/(2pi)xx2n pi=n lambda,` Where, n = 0, 1, 2, ........... For destructive interference : (a) Phase difference between two waves should be `phi =J(2n-1)pi, ` where n = 1, 2, 3, ........ (b) Path difference should be, `Delta =(lambda)/(2pi)xx` Phase difference `=(lambda)/(2pi)xx(2n-1)pi` `=((2n-1)lambda)/(2)` Where, n = 1, 2, 3 .......... |
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