An interference is observed due to two coherent sources 'A' & 'B' having phase constant zero separated by a distance 4 λ along the y − axis where λ is the wavelength of the source. A detector D is moved on the positive x − axis. The number of points on the x − axis excluding the points , x = 0 & x = ∞ at which maximum will be observed is
Text Solution
Verified by ExpertsThe correct answer is:
A
At B; Δ P = 4 λ (maxima)
At x = ∞ ; Δ P = 0 (maxima)
Hence in between; the point at which path difference is either λ , or 2 λ or 3 λ → they will be maximas. Hence 3 maximas.
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