A) \[533.3\text{ }nm\]
B) \[416.7\text{ }nm\]
C) \[666.7\text{ }nm\]
D) \[577.7\text{ }nm\]
Correct Answer: B
Solution :
[b] For minima \[y=\frac{\left( 2n-1 \right)D}{2d}\lambda \] For the point just in front of one of the slit. \[y=0.5\times {{10}^{-3}}m\] \[\Rightarrow \,\,\,0.5\times {{10}^{-3}}=\frac{\left( 2n-1 \right)0.8}{2\times {{10}^{-3}}}\lambda \] \[\lambda =\frac{1250}{\left( 2n-1 \right)}nm\] In the range \[400\text{ }nm\]to \[700\text{ }nm,\] \[\lambda =416.7\,nm\]You need to login to perform this action.
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