When the object is beyond 2F, the image formed is
at F
at 2F
Between F and 2F
at infinity
The defect of hypermetropia may be corrected by using
Concave lens
Convex lens
Prism
None of these
Which of the following lens is thicker in the middle and thinner at the edges ?
Where will the image be formed when the object is at infinity ?
At F
At F on other side of the lens
At 2F
At 2F on other side of the lens
The point at which the incident ray meets the separating surface is called
Point of incidence
Point of refraction
Point of diversion
When a light ray travels from a rarer medium to a denser medium
It bends towards the normal
It bends away from the normal
The ray suffers no refraction
The distance between the optical centre and the principal focus of a lens is known as
Optical centre
Principal focus
Focal length
The geometric centre of a lens is called
Centre of curvature
Principal axis
The defect of myopia can be corrected by using
The distance by which a person cannot see nearby objects clearly is called
Hypermetropia
Myopia
Cataract
