A) 1.5 mm
B) 1.0 mm
C) 0.5 mm
D) None of these
Correct Answer: C
Solution :
Distance between consecutive bright fringes or dark fringes\[=\beta \] \[\beta =\frac{\lambda D}{d}=\frac{550\times {{10}^{-9}}\times 1}{1.1\times {{10}^{-3}}}=500\times {{60}^{-6}}=0.5\ mm\]
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