A far-sighted person has a near point at 100 cm. What must
be the power of the correcting lens?

A far sighted person has a near point of 60 cm. What power lens should be used for eye glasses such that the person can read a book at a distance of 25 cm.

A far sighted person has a near point of 60"cm" . What power lens should be used for eye glasses such that the person can be read this book at a distance of 25 cm.

A far sighted person has a near point of 60"cm" . What power lens should be used for eye glasses such that the person can be read this book at a distance of 25 cm.

A far sighted person has a near point of 60"cm" . What power lens should be used for eye glasses such that the person can be read this book at a distance of 25 cm.

A far sighted person has his near point 50 cm. Find the power of lens he should use to see at 25 cm, clearly.

A far sighted person has his near point 50 cm. Find the power of lens he should use to see at 25 cm clearly.

A certain myopic person has a far point of 150 cm. What power of a corrective lens must have to allow him to see distant objects clearly ?