A short sighted person can see objects at 20cm from his eyes. What type of lens is to be used to see clearly objects at 100cm away?

A short-sighted person can see distinctly the object situated at a distance of 20 cm from him. What type of lens will he use to see the objects situated at a distance of 100 cm from him ? What will be the power of the lens ?

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.

The far point of a myopic (short-sighted ) person is 80 cm in front of the eye. What is the power of the lens required to enable him to see very distant objects clearly.

A boy can see the objects distinctly only in between 15 cm and 200 cm from his eyes . What should be the power of the lens (in m^(-1) unit ) he will use to see the objects at infinity distinctly ? What will the least distance of distinct vision of his eyes with spectacles ?

The near point of a hypermetropic (long -sighted ) person is 75 cm from the eye . What is the power of the lens required to enable the person to read clearly a book held at 25 cm from the eye ?

A Person who can see objects clearly at a distance of 10cm, required spectacles to be able ot see clearly objects at a distance of 30cm. What types of spectacle should he use? Find the focal length of the lens.

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 with defective eyes can see the objects distinctly up to the distance 20 cm . What type of lens should be used and of what power?

A myopic person can not see objects lying beyond 2m. What is the power of the lens required to remove this defect?

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?