Question

Why image distance (v) is always negative in concave and convex lenses?
PLEASE HELP!

Answer 1

Explanation:

For focal length, f in lens is always taken as negative for concave and positive for convex. ... And for image distance, V in lens it is taken as positive in Convex lens since image is formed on +X side. It is taken as negative in Concave lens since image is formed in -X side of the Cartesian.

Answer 2

Answer:

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