A ray of light falling on a lens passes through it undeviated when the
ray of light falls on the focus of the lens
ray of light falls on the optical centre of the lens
ray of light falls on the pole of the lens
ray of light falls on the centre of curvature of the lens
When a ray of light falls on the optical centre of a lens, it passes undeviated.
A ray of light after refraction through a lens emerges parallel to the principal axis of the lens. The incident ray passes through :
(a) its optical centre
(b) its first focus
(c) its second focus
(d) the centre of curvature of the first surface.
A ray of light incident on the optical centre of a spherical lens, after refraction passes through: