Q10.18Short answer
Consider a two slit interference arrangements (Fig. 10.4) such that the distance of the screen from the slits is half the distance between the slits. Obtain the value of D in terms of λ such that the first minima on the screen falls at a distance D from the centre O. S1 T1 OP = x P CO = D Source O S1C = CS2 = D S C S2 T2 Screen Fig. 10.4 LA S1
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