Question

A person least distance of distinct vision is 35cm . What type of lens can we do to correct his vision why

Answer 1

Answer:

person can see clearly upto 35 cm

i.e image distance for his eye lens = 35cm

he wants to see object till infinity..

by lens formula

1/f = 1/v - 1/u

1/f = 1/-v......(u = infinity)

so power= 1/-v

= 1/35cm = -2.85 m^-1