Question

explain the formation of rainbow

Answer 1

Here is your answer:

One of nature's most splendid masterpieces is the rainbow. A rainbow is an excellent demonstration of the dispersion of light and one more piece of evidence that visible light is composed of a spectrum of wavelengths, each associated with a distinct color. To view a rainbow, your back must be to the sun as you look at an approximately 40 degree angle above the ground into a region of the atmosphere with suspended droplets of water or even a light mist. Each individual droplet of water acts as a tiny prism that both disperses the light and reflects it back to your eye. As you sight into the sky, wavelengths of light associated with a specific color arrive at your eye from the collection of droplets. The net effect of the vast array of droplets is that a circular arc of ROYGBIV is seen across the sky. But just exactly how do the droplets of water disperse and reflect the light? And why does the pattern always appear as ROYGBIV from top to bottom? These are the questions that we will seek to understand on this page of The Physics Classroom Tutorial. To understand these questions, we will need to draw upon our understanding of refraction,internal reflection and dispersion.

Answer 2

A rainbow is a natural spectrum which is seen in the sky jz after the shower of rain,due to dispersion of white light through the tiny water droplets A rainbow is always seen in the opposite direction of sun . When sunlight falls on the water droplets,they refract n disperse the light  cs they act as tiny prisms. Due to the dispersion n internal refraction of light a band of colours appear which is called RAINBOW.