User:Jayakrishna.avaru/sandbox

LIGHT

LIGHT
Light is electromagnetic radiation,which is visible to the human eye and it is responsible for the sensation on vision

PROPERTIES OF LIGHT
1 It travels in the form of wave

2 It travels even in vacuum

3 Its speed is very high and its value is 300000 Km/s

4 Light undergoes REFLECTION REFRACTION INTERFERENCE DIFRACTION POLARISATION

REFLECTION
When a light ray falls an object like mirror and bounces off, it is called reflection.

REFRACTION
Refraction is the bending of a light when it enters a other optical medium. Then refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media. The angle of bending depends on the refractive indices of the two optical media.

TOTAL INTERNAL REFLECTION
Total internal reflection is a phenomenon which occurs when a propagating light strikes on a first medium boundary at an angle larger than a particular incidence angle called critical angle with respect to the normal to the surface,

Then light cannot pass through second medium and is entirely reflected back in the first medium. The critical angle is the angle of incidence above which the total internal reflection occurs.