A) \[\frac{d}{9D\lambda }\]
B) \[\frac{d}{27D\lambda }\]
C) \[\frac{d}{81\,\,D\lambda }\]
D) \[\frac{d}{D\lambda }\]
Correct Answer: C
Solution :
[c] \[\beta =\frac{\lambda 'D'}{d'}=\frac{3\lambda \,3D}{d/3}=27\frac{\lambda D}{d}.\] No. of fringes \[=\frac{1/3}{\beta }=\frac{d}{81\lambda \,\,D}.\]You need to login to perform this action.
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