What focal length should the reading spectacles have for a person whose near point is `50 cm` ?

What focal length should the reading spectacles have for a person whose near point is 50cm ? (NCERT Solved Example)

What focal length should the reading spectacles have for a person for whom the least distance of distinct vision is 50 cm ?

What focal length should the reading spectacles have for a person for whom the least distance of distinct vision is 50 cm?

What focal length should the reading spectacles have for a person for whom the least distance of vision is 50 cm ? (The distance of Normal vision is 25cm).

The least distance of distinct vision of a person is 75 cm. The focal length of the reading spectacles for such a person should be

Find the focal length of the lenses used in spectacles of a person if the power of the spectacles is 0.5D.

A thin convex lens of focal length 5 cm is used as a simple microscope by a person with normal near point (25 cm). What is the magnifying power of the microscope ?

A thin convex lens of focal length 5 cm is used as a simple microscope by a person with normal near point (25 cm). What is the magnifying power of the microscope ?

The least distance of distance vision of a person is 75 cm. The focal length of the reading spectacles for such a person should be