Question

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

Answer 1

Answer:

But given person have least distance of distinct vision as 50 cm. So u = -25 cm and v = -50 cm. Hence, focal length of reading glasses should be +50 cm. i.e. convex lens

hope these will help you....

Answer 2

Answer:

hey here is your answer . I hope it will help you