In the figure shown here, what is the equivalent focal length of the combination of lenses (Assume that all layers are thin)? [NEET 2023]
Text Solution
Verified by ExpertsThe correct answer is:
B
The given situation is shown below.
Lens 
and 
are plano concave lens.
Focal length of lens 
is given as
Similarly, focal length of lens 
,
Now, focal length of convex lens 
is given as
If F be the focal length of combination, then
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