A person needs a lens of power -4.5D for a correction of his vision. C (a) what kind of defect in vision is the person having? (B) what is focal length of the corrective lens? (B) name the type of corrective lens.
Answers
Answered by
2
a.nearsightedness
b.2.25
c. concave
b.2.25
c. concave
Similar questions