A) R
B) 2R
C) 4R
D) R/2
Correct Answer: C
Solution :
Ratio of focal lengths of lens in liquid and air. \[\frac{{{f}_{1}}}{{{f}_{a}}}=\frac{{{(}_{a}}{{n}_{g}}-1)}{\left( \frac{_{a}{{n}_{g}}}{_{a}{{n}_{1}}}-1 \right)}\] \[\frac{{{f}_{1}}}{R}=\left( \frac{(1.5-1)}{\frac{1.5}{1.33}}-1 \right)\] \[{{f}_{1}}=4R\] .You need to login to perform this action.
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