Lakhmir Singh and Manjit Kaur Solutions for Chapter: The Human Eye and The Colourful World, Exercise 10: Questions Based on High Order Thinking Skills (HOTS)

A short-sighted person has a near point of $15 \mathrm{c}\mathrm{m}$ and a far point of $40 \mathrm{c}\mathrm{m}$. Can he see clearly an object at a distance of $25 \mathrm{c}\mathrm{m}$?

A short-sighted person has a near point of $15 \mathrm{c}\mathrm{m}$ and a far point of $40 \mathrm{c}\mathrm{m}$. Can he see clearly an object at a distance of $50 \mathrm{c}\mathrm{m}$?

A short-sighted person has a near point of $15 \mathrm{c}\mathrm{m}$ and a far point of $40 \mathrm{c}\mathrm{m}$. To see clearly an object at infinity, what kind of spectacle lenses does he need?

A near point of a long-sighted person has a near point of $50 \mathrm{c}\mathrm{m}$ from the eye. Can he see clearly an object at a distance of $20 \mathrm{c}\mathrm{m}$?

A near point of a long-sighted person has a near point of $50 \mathrm{c}\mathrm{m}$ from the eye. Can he see clearly an object at infinity?

A near point of a long-sighted person has a near point of $50 \mathrm{c}\mathrm{m}$ from the eye. To read a book held at $25 \mathrm{cm}$, will she need converging or diverging spectacle lenses?

A person can read a book clearly only if he holds it at an arm's length from him. Name the defect of vision if the person is an old man.

A person can read a book clearly only if he holds it at an arm's length from him. Name the defect of vision if the person is a young man.