A) 1 mm
B) 0.01 mm
C) 0.1 m
D) 10 m
Correct Answer: A
Solution :
Distance between two consecutive Dark fringes \[=\frac{\lambda D}{d}=\frac{6000\times {{10}^{-10}}\times 1}{0.6\times {{10}^{-3}}}\] \[=1\times {{10}^{-3}}m=1\ mm.\]
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