CH 5. LIGHT

Concave mirror

The full form of VIBGYOR is:- Violet, Indigo, Blue, Green, Yellow, Orange, and Red.

The splitting of white light into its constituent seven colours is called dispersion of light.

A virtual image is one in which the light rays do not really pass through the image point but appear to diverge from that point.

A real image is one in which light rays actually intersect or pass through the image point.

An image is a point or plane to which rays are converged or from which they appear to diverge after the reflection or refraction of light.

The size of the mirror is called its aperture.

The distance between the pole and the focus is called the focal length.

A plane drawn perpendicular to the principal axis and passing through the principal focus.

It is a point on the principal axis at which the rays parallel to the reflection or seem to come from.