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Physics · PYQ NEET UG 2016(2)
हिन्दीA person can see clearly objects only when they lie between \( 50\text{ cm} \) and \( 400\text{ cm} \) from his eyes. In order to increase the maximum distance of distinct vision to infinity, the type and power of the correcting lens, the person has to use, will be
Correct answer · Option 3
concave, \( -0.25\text{ dioptre} \)
Explanation
For myopia correction, far point \( v = -400\text{ cm} \), \( u = -\infty \). Focal length \( f = -400\text{ cm} = -4\text{ m} \). Power \( P = \frac{1}{f} = -\frac{1}{4} = -0.25\text{ D} \) (concave).
