Q. 9

A person with a myopic eye cannot see objects beyond a distance of 1.5 m from it. What would be the nature and power of the corrective lens used to restore proper vision?

Answer :

Since the eye is myopic, hence, the image should be formed at 1.5 m or before that on the same side as the object.


Distance of far point, v = -1.5m = -150 cm


Object distance , u = ∞


Now, to find focal length we apply the formula:





f = -150 cm


Now,


The power is given as:


Power =


The lens used is as double concave lens.


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