A) increase
B) decrease
C) remain same
D) does not depend on colour of light
Correct Answer: A
Solution :
\[{{\mu }_{R}}<{{\mu }_{B}}\] \[\frac{1}{f}=(\mu -1)\left( \frac{1}{{{R}_{1}}}-\frac{1}{{{R}_{2}}} \right)\] \[\frac{1}{{{f}_{B}}}>\frac{1}{{{f}_{R}}}\] \[{{f}_{R}}>{{f}_{B}}.\]You need to login to perform this action.
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