A) f
B) f/2
C) f/4
D) 4f
Correct Answer: B
Solution :
[b] Cutting a lens in transverse direction doubles their focal length i.e. 2f. Using the formula of equivalent focal length, \[\frac{1}{f}=\frac{1}{{{f}_{1}}}+\frac{1}{{{f}_{2}}}+\frac{1}{{{f}_{3}}}+\frac{1}{{{f}_{4}}}\] We get equivalent focal length as f/2.You need to login to perform this action.
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