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Two coherent monochromatic sources A and...

Two coherent monochromatic sources A and B emit light of wavelength `lambda`. The distance beween A and B is `d = 4lambda`.

(a) If a light detector is moved along a line CD parallel to AB, what is the maximum number of minima observed ?
(b) If the detector is moved along a line BE perpendicular to AB and passing through B, what is the number of maxima observed ?

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The correct Answer is:
[(a) 8, (b) 4]
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