Q. The eye can be regarded as a single refracting surface . The radius of curvature of this surface is equal to that of cornea (7.8 mm). This surface separates two media of refractive indices 1 and 1.34. Calculate the distance from the refracting surface at which a parallel beam of light will come to focus.


$\frac{1.34}{V} - \frac{1}{\infty} = \frac{1.34-1}{7.8}$
$ \therefore V= 30.7 mm$

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