Neet Solved Paper 2013 Question 40
Question: 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 be
Options:
A) 5 cm
B) 2.5 cm
C) 1.67cm
D) 1.5cm
Show Answer
Answer:
Correct Answer: C
Solution:
Given $ P _1=40D, $ and $ P _2=20D $
We have $ P _{eff}=40D+20D=60D $
$ \Rightarrow $ $ f=\frac{100}{P _{eff}}=\frac{100}{60} $ $ =1.67,cm $
