Q. 6

# Two source S_{ A. S1 and S2 have the same intensities.B. S1 and S2 have a constant phase difference.C. S1 and S2 have the same phase.D. S1 and S2 have the same wavelength.}

Answer :

As we can see that all the pattern of distribution are equal in magnitude, also at the point of minima there is zero intensity and we know at the point of minimal, the intensity is given by ( I_{1} and I_{2} are intensity by source S_{1} and S_{2})

Since, I_{Min}=0, Therefore, I_{1}and I_{2} are equal in magnitude. It also implies that they have the same phase or zero phase difference between them.

Also, we are getting a pattern, therefore; S_{1} and S_{2} have a constant phase difference which is a requisite for obtaining a fringe pattern

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