Know how and when does a Rainbow form

Publish Date: 17 Jul, 2021 |

Rainbow formation:

Rainbow is such a natural feat that everyone must have seen it at some point or the other. It is a unique sight of nature usually visible after rain. 

What is a Rainbow: 

Rainbow is a very beautiful phenomenon of optical deflection, it is arc-shaped, and appears in seven colors. In some places, the rainbow is also known as Meghdhanush. 

In this article further, we will gain insights into the scientific reasons for the rainbow formation. 

How does a Rainbow form?

When a ray of sunlight passes through a prism, it splits into seven colors. This is called dispersion of light. A Rainbow is formed due to the reflection, refraction, and deflection of light in water droplets. The spectrum of seven colors is visible in the rainbow in the shape of an arc in the sky.

The order of the colors of the rainbow is as follows. Red, Orange, Yellow, Green, Blue, Indigo, Violet. And usually red is on the outside and purple is on the inside.

The sequence of Rainbow is known as VIBGYOR:

1. Violet

2. Indigo

3. Blue 

4. Green

5. Yellow

6. Orange,

7. Red

How and where is the rainbow visible?

Even if there is sunshine between the drizzling drops of rain, then face the sun, somewhere you will see a rainbow. A rainbow can be witnessed when the sun is behind you and the rain is ahead. 

Apart from this, the rainbow is usually always visible during the day near huge waterfalls. Rainbow is visible more clearly when there are dark clouds in the sky. It is often seen that the rainbow is visible in the west in the morning and in the east in the evening.

Double Rainbow:

At times, more than one rainbow can be witnessed. Two rainbows are seen when the droplets present in the same place come in contact with the sun repeatedly. As soon as the colored light from the first rainbow changes to white, it interacts with other droplets, and then the light is scattered into different colors, but its colors are in the reverse order.



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