Question

An old man suffering with myopia wears eye-glasses with power of -5.5D for distance viewing. The optician
prescribes a correction of +1.D in the near vision section of his bifocal lens. This is measured relative
1. Find (a) The focal length of his distance viewing part of the lens and (b) The focal length of near vision
part of the lens ​

Answer 1

Answer:

the focal length of near vision is 25 CM

1 diopter is equal to 1 by f that is 1 diopter is equal to 1 upon focal length that is focal length is equal to 1 metre