Which one of the following pair given below is correct about focal length of various lenses?
A
For equi-biconvex lens 
B
For equi-biconcave lens 
C
For plano-convex lens 
D
For plano-concave lens 
Text Solution
Verified by ExpertsThe correct answer is:
C
As we know that
For equi-biconvex lens, 
For equi-biconcave lens, 
For plano-convex lens, 
For plano-concave lens, 
Hence, option is correct.
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