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


The power is given as:

Power =

The lens used is as double concave lens.

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