A) \[{{\sin }^{-1}}\frac{n\lambda }{d}\]
B) \[{{\cos }^{-1}}\frac{4\lambda }{d}\]
C) \[{{\tan }^{-1}}\frac{d}{4\lambda }\]
D) \[{{\cos }^{-1}}\frac{\lambda }{4d}\]
Correct Answer: B
Solution :
[b] Path difference, \[\Delta x={{S}_{1}}P-{{S}_{2}}P=d\cos \,\theta \] \[\therefore \,d\cos \theta =4\lambda \] or\[\cos \theta =(4\lambda /d)\]You need to login to perform this action.
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