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Q. Two coherent sources $A \& B$ emitting light of wavelength $\lambda$ are placed at position $(-D, 0)$ and $(-D, 3 \lambda)$ respectively. Here $D>>\lambda$. The number of minima on $y$-axis and maxima on $x$-axis respectively arePhysics Question Image

Solution:

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Hence there are $6$ minimas of y axis and $5$ maxima of x-axis.