Light Reflectio...

The distance between the extreme points on the periphery of the mirror is called :

If we say that the focal length of a spherical mirror is $$n$$ times its radius of curvature, then $$n$$ must be

A concave mirror is made from a hollow sphere of radius of curvature $$30 cm$$.  If an object of height $$2 cm$$ is placed at $$10 cm$$ from the pole of the mirror, determine the size of the image :

When a ray of light passes from an optically less dense medium to a more dense medium, it :

A convex lens forms a virtual image of an object placed at $$15  cm$$ from the lens. The focal length of the lens can be

The middle point of a spherical mirror is called

An object is placed at 40 cm from the optic centre of a convex lens on its principal axis. if the focal length of the lens is 24 cm, find how far from the lens the screen should be placed to obtain a well-defined image.

The bending of light ray after passing through a medium is commonly known as :

Which of the following term is not associated with a lens?

The distance between the optical centre of lens and the focal point is called :