Q- The minimum focal length of an eye lens is f = 2.8 cm and the distance between the lens and retina = 3.00 cm. Find the focal length of the lens to read a book at a distance of 25 cm from eye-lens.
Q- The minimum focal length of an eye lens is f = 2.8 cm and the distance between the lens and retina = 3.00 cm. Find the focal length of the lens to read a book at a distance of 25 cm from eye-lens.