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Refraction at Curved Surfaces

A person uses...

Question

A person uses spectacles of power +1D. find the least distance of distinct vision for him.

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Solution

$T h e f o c a l p l a n e o f t h e l e n s = + 100 c m n o w i f n e a r p o i n t o f t h e d e f e c t i v e e y e i s u c m t h e n w e c a n w r i t e \frac{1}{100} = \frac{1}{u} + \frac{1}{v} w h e r e v i s t h e d i s \tan c e o f t h e d i s t i n c t v i s i o n . v = \frac{100 u}{u - 100} [A N S]$

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