A) \[5000\,\,{AA}\]
B) \[6000\,\,{AA}\]
C) \[7000\,\,{AA}\]
D) \[9000\,\,{AA}\]
Correct Answer: B
Solution :
Position of 3rd bright fringe \[{{x}_{3}}=\frac{3D\lambda }{d}\] \[\Rightarrow \lambda =\frac{{{x}_{3}}d}{3D}=\frac{(0.9\times {{10}^{-2}})\times (0.28\times {{10}^{-3}})}{3\times 1.4}=6000{AA}\]
You need to login to perform this action.
You will be redirected in
3 sec
