Question

State the defect of vision Kavita is suffering from.

Answer 1

Power of lens-

$P=-2.5D$

Focal length-

$f=\frac{1}{P}$

$\Rightarrow f=\frac{100}{-2.5}$

$\Rightarrow f=-40cm$

A concave lens is used for the correction of myopia or short sightedness.