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

What is least distance of distinct vision?

What is meant by least distance of distinct vision?

Define the following : least distance of distinct vision

Least distance of distinct vision of a normal eye is:

The approximate least distance of distinct vision of normal eye is…. .

A telescope has an objective of focal length 50 cm and eye-piece of focal length 5 cm.the last distance of distinct vision is 25 cm.The telescope is focussed for ditinct vision on a scale 200 cm awya from teh objective.Caculate the sepration between the objective and eye-piece