05/03/17: Where do rainbows come from?

The fifth post for my challenge! Today I am going to be talking about where rainbows come from because I think that they are magical little things. I also never knew the science behind it, so here goes nothing/something:

Where do rainbows come from? 🌈

What is a rainbow?

The definition of a rainbow is an arch of colours visible in the sky, caused by the refraction and dispersion of the sun’s light by rain or other water droplets in the atmosphere. The colours of the rainbow are generally said to be red, orange, yellow, green, blue, indigo, and violet.

When do they occur?

Rainbows happen when sunlight and rain combine in a very specific way. The beams of sunlight separate into the colours we see in the rainbow as they enter a raindrop. Sunlight is actually made up of different colours that we don’t usually see. When a beam of sunlight comes down to Earth, the light is white. But, if the light beam happens to hit raindrops on the way down at a certain angle, the different colours that make up the beam separate so that we can see them β€” in the form of a rainbow.

The angle for each colour of a rainbow is different because the colours slow down at different speeds when they enter the raindrop. The light exits the raindrop in one colour, depending on the angle it came in, so we see only one colour coming from each raindrop. Light at different angles coming through many raindrops forms the rainbow that we see, in stripes of red, orange, yellow, green, blue, indigo and violet.

 

Very brief I know, but a little information on the wonderous rainbows! See you tomorrow

Elettra

 

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