Question

In case of concave lens
(1 Point)
Focal length is positive , image distane is negative
Focal length is negative , image distane is positive
Focal length is positive , image distane is positive
Focal length is negative , image distane is negative


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Answer 1

Answer:

focal length is positive and image distance is positive as well as negative because in one case when object placed between pole and focus ,it forms virtual image so image distance will be positive and in all cases of real image , image distance will be negative