1.

For a normal eye, the cornea of eye provides a converging power of `40 D` and the least converging power of the eye lens behind the cornea is `20 D`. Using this information, the distance between the retina and the cornea eye lens can be estimated to beA. 5 cmB. 2.5 cmC. 1.67 cmD. 1.5 cm

Answer» Correct Answer - C
Given, power `(P_(1)) = 40 D` and power `(P_(2))=20 D`
We have,
`P_("eq")=P_(1)+P_(2)=40+20=60 D`
So, `" "(1)/(f_("eq"))=(1)/(f_(1))+(1)/(f_(2))`
`rArr " " f_("eq")=(100)/(P_("eq"))=(100)/(60)`
`= 1.67 cm`


Discussion

No Comment Found

Related InterviewSolutions