Question

At which location of object in front of concave lens, the image between focus and optical center is formed. (a) anywhere between center and Infinity (b) At F (c) at 2F. (d) infinity​

Answer 1

We follow the usual method of drawing the ray-diagram:

Consider two rays starting from the object. One passes through the optical center of the lens and the other would get refracted by the lens. e observe that on the other side of the lens, both these rays diverge and the image location can be found by extending the refracted rays backwards on the object's side the lens.

When object AB is placed between the optical center and Focus F

1 of the Convex lens, the image A B

′ is always located somewhere on the same side of the lens as the object and somewhere further from the lens. The image is located behind the object is upright and enlarged.

Answer 2

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• CORRECT ANSWER - ( b ) At F