Answer: Myopia is a condition in which a pupil is unable to see the chalkboard that is far away from her. As a result, the doctor recommends a concave lens with a proper focal length.
Negative sign shows that it is a concave lens.
A person needs a lens of power –4.5 D for correction of her vision. (c) What is the nature of the corrective lens?
A person needs a lens of power –4.5 D for correction of her vision. (c) What is the nature of the corrective lens?