Question

A man's shortest distance of distinct aw 20
cm. What will be the type and
paus
of spectacle lens which he
would require to enable him
to read a book at a distance of
60cm​

Answer 1

Answer:

a man's shortest distance of distinct vision is 20 cm what will be the type and power of the spectacle lens which he would he would require to enable him to read a book at the distance of 60 cm ?F:30 cm .therefore ,lens must be concave .