Question

A Doctor has prescribed a corrective lens of power - 1.2D to a person suffering from a defect of vision
1. Identify the defect from which he is suffering?
2. Find the focal length of the lens?
3.Is the prescribed lens is diveging or converging? show the nature of this lens with the help of a ray diagram?

Answer 1

Answer:

ans 1) Myopia

2 )

3) high converging lens

Answer 2

Answer:

Explanation:

1. If the power of the lens is -ve , then he would be suffering from Myopia.

2. P = 1/f , then f should be 1/-1.2cm

3. Concave lens will be prescribed. And nature would be Real n inverted.