Concave lens is also known as ………………..
a) Diverging lens
b) Converging lens
c) Both a and b
d) None of these
A ray parallel to principal axis, after refraction from convex lens……… NTS PST 15/12/2019 (11:30)
a) Does not bend
b) Passes through center of curvature
c) Passes through principal focus
d) Passes through center of lens
The mid or central point of a lens
is called its……………., denoted by “O”.
NTS
PST 15/12/2019
(8:30)
a) principal axis
b) focal length
c) focal point
d) optical center
A line passing through center of
curvature, optical center and focal point is called ……....
a) principal axis
b) focal length
c) focal point
d) optical center
The lens used in camera is………
a) convex lens
b) concave lens
c) double-convex
d) Plano-convex
The camera lens forms a ……image of an object on the film …………….
a) Real, small and inverted
b) virtual , small and inverted
c) Real, large and straight
d) Virtual, large and straight
