Light

Principal Focus: When a pencil of parallel rays adjacent to the principal axis incident on a lens in a direction parallel to principal axis, then…

Centre of curvature: Both surfaces of a lens are parts of different spheres. The centre of each sphere is called the centre of curvature of…

A lens is a transparent refractive medium bounded by two spherical surfaces. Lenses are of two types: i) Convex lens or converging lens ii) Concave…

The optical fiber is made of very long thin flexible but solid glass or plastic fiber. The refractive index of the material of fiber is…

Sometimes thirsty traveler in desert sees the inverted image of a distant tree and thinks there is water. When he comes close to the tree…

If the angle of incidence in denser medium is increased further (i > θc), then the incident ray of light will be totally reflected in…

When ray of light passes from a denser medium to a rarer medium, then the refracted my is deviated away from the normal. As a…

For a particular pair of transparent medium and a. particular colour of light when ray of light refracts from one medium to another, then if…

We have already noticed that in the figure AB is the incident ray, BC is the refracted ray and NBN’ is the normal drawn at…

Look at figure 1, here two media, air and glass are shown. Coming from air medium following the path AB, light ray incidents at point…