CBSE Class 10 Answered
I am totally confused that what values for object and image distance should I take while solving the numericals involving the task of finding the corrective focal length of a myopic and hypermetropic eye????
Asked by | 01 Mar, 2012, 10:24: AM
Expert Answer
A person affected by hypermetropia has a shorter-than-normal eye ball, making the
retina too close to the lens system. This causes images of near objects to be formed
behind the retina.
retina too close to the lens system. This causes images of near objects to be formed
behind the retina.
For Myopic :
concave lens is used to correct it and value of u is to reduce the focal length of concave lens from original object distance.
v = focal length of concave lens.
For hypermetropia:
For the object distance, increase the distance of object by focal length of convex lens
and final image distance will be focal length of the convex lens
Answered by | 01 Mar, 2012, 12:00: PM
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