question_answer

For a normal eye, the cornea of eye provides a converging power of 40D and the least converging power of the eye lens behind the cornea is 20D. Using this information, the distance between the retina and the cornea-eye lens can be estimated to be            [NEET 2013]

A)  5 cm               

B)       2.5 cm

C)  1.67 cm        

D)       1.5 cm

Correct Answer: C

Solution :

Given  and

We have