Refractive index of kerosene is

When the object is beyond 2F, the image formed is

Behind the cornea of human eye, is the opaque muscular diaphragm called

The eye lens is held in position by a pair of muscles called

The band of colours that we get when white light splits into its components is known as the

The defect of myopia can be corrected by using

The geometric centre of a lens is called

Hypermetropia which develops at an advanced age in life is known as

The small aperture in the centre of the iris is called

The point at which the incident ray meets the separating surface is called