Question

A lens of focal length 12cm forms an erect image three times the object.the distance between the object and image is...

Answer 1

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A lens of focal length 12cm forms an erect image three times the object.the distance between the object and image is...
Answer:-
in:-(image)
it is only occurred in convex lens as only in convex lens image is erect and enlarged in 1st case.








Please mark my answer as brainlist answer☺.