1.
The beautiful
phenomenon of the rainbow is a combination of different phenomena – dispersion,
refraction and reflection of light.
2.
The rainbow
appears in the sky after a rain shower.
3.
The water
droplets act as small prisms.
4.
When sunlight
enters the water droplets present in the atmosphere, they refract and disperse
the incident sunlight.
5.
Then they
reflect it internally inside the droplet and finally again refract it.
6.
As a collective
effect of all these phenomena, the seven coloured rainbow is observed.
