A shortsighted man can read the writings of a book keeping it at a distance of 15 cm from his eyes. To read the book placed at a distance of 60 cm from his eyes what type of spectacles should he use ? What will be the power of the spectacles ?

A short-sighted person can read a book only up to 15 cm from his eyes. To read a book placed at a distance of 25 cm from him what type of spectacles should he use? What be the power of the spectacles?

A person can see distinctly up to a distance of 2 m and no further. To see distinctly up to a long distance what type of spectacles should he use? What will be the power of the lens of the spectacles?

The near point of a man is at a distance of 200 cm from his eyes. What spectacles should he use in order to read a print 25 cm away from his eyes ?

A person who can see objects clearly at a distance of 10cm , requires spectacles to be able to see clearly objects at a distance of 30 cm. what type of spectacle should he use? Find the focal length of the lens.

A person can see clearly only upto a distance of 25 cm . He wants to read a book placed at a distance of 50cm . What kind of lens does he require for his spectacles and what must be its power ?

A person can see clearly only upto a distance of 25 cm . He wants to read a book placed at a distance of 50cm . What kind of lens does he require for his spectacles and what must be its power ?

While reading the book a man keeps the page at a distance of 2.5 cm from his eye. He wants to read the book by holding the page at 25 cm. What is the nature of spectacles one should advice him to use to completely cure his eye sight ?

The near point of a person is 75 cm. In order that he may be able to read book at a distance 30 cm. The power of spectacles lenses should be

The near point of a person is 75 cm. In order that he may be able to read book at a distance 30 cm. The power of spectacles lenses should be

A short sighted person can see objects most distinctly at a distance of 16 cm . If he wears spectacles at a distance of 1 cm from the eye, what focal length should he have so as to enable him to see distinctly at a distance of 26 cm ? ( c) The person above prefers to remove his spectacles while reading a book. Explain why ? (NCERT Solved Example)