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Concave lens has negative focal length why​
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Concave lens has negative focal length why​

User Suhprano
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2 Answers

8 votes
For focal length, f in lens is always taken as negative for concave and positive for convex. ... It is taken as negative in Concave lens since image is formed in -X side of the Cartesian. In Concave mirror V is taken as positive and negative for convex mirror.
User Jcwenger
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3.3k points
5 votes
if it does do it then yeah it will for it
User Sean Woods
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