Manu cannot see objects kept beyond 2 m distinctly. He consults the doctor to know about his defect. Few questions came into his mind. Answer the below questions by using the above data.
1. What is the power of the lens to be used to correct the defect?
(i) -9.5 D
(ii) -3.5 D
(iii) -0.5 D
(iv) 6.5 D
2. What is the defect that Manu is suffering from?
(i) Myopia
(ii) Hypermetropia
3. Which lens is used to correct the defect?
(i) Convex lens
(ii) Concave lens
4. What is the formula for finding the focal length of the lens?
(i) \(\frac1{P^2}\)
(ii) \(\frac1{P}\)
(iii) P
5. What is the nature of corrective lens?
(i) Negative
(ii) Positive
