The focal length of a lens suggested to a person with Hypermetropia is 100cm. Find the distance of near point and power of the lens.

The focal length of a lens is -50 cm. The nature and power of the lens is

What is the focal length of bi-convex lens to use to correct a hypermetropia in terms of near point 'd'?

The near point of a person having hypermetropia is 60 cm in front of the eye. Find the focal length and power of lens required to enable him to see the objects clearly placed at 25 cm from the eye.

The near point of a person suffering from hypermetropia is 75 cm. calculate the focal length and power of the lens required to enable him to read the newspaper which is kept at 25 cm form the eye.

A focal length of a lens 10cm. What is power of a lens in dipotre?

A focal length of a lens 10cm. What is power of a lens in dipotre?