Light Reflectio...

A ray of light travelling in air is incident on the plane of a transparent medium. The angle of incident is $$45^0$$ and that of refraction is $$30^0$$. The refractive index of the medium with respect to air is:

Find the refractive index of glass with respect to water. The refractive indices of glass and air with respect to air are $$3/2$$ and $$4/3$$ respectively.

In case of a virtual and erect image, the magnification of a mirror is :

If the magnification of a body of size 1 m is 2, what is the size of the image?

Formula of focal length in convex lens is

A light ray passing from crown glass to flint glass, then the speed of light is:

The rays parallel and close to the principal axis are called:

The magnification produced by a concave mirror :

Ratio of the size of the image to the size of the object is known as:

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