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Refraction at Curved Surfaces

A far point p...

Question

A far point person suffering from myopia is 2m from the eye. Find the the focal length and power of corrective lens that will correct his vision.

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Solution

Given,

Distance of far point x = 2 m

Focal length of the corrective lens to view distant objects correctly f = -x

= -2 m Ans.

Power of the lens P = 1/f

= 1/(-2)

= -0.5 D Ans.

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