How a Rainbow formation occur?
The phenomena of formation of a rainbow in the sky of 7 colors because of droplets in the air at a particular angle and place.
From coloring books to record covers, rainbows are everywhere.
I bet you'll even remember the colours stupidly twice. Although in real life no one really says "indigo”, although I guess ROYGBV doesn't really have the same ring to it. As anyone who's tried to chase one finds out, a rainbow isn't really there. You can't go over it, and you can't get to the end of it.
It’s become a mythical representation of the unattainable. In Navajo and Norwegian mythology, it’s a bridge that only gods could take between heaven and Earth. For Christians and Buddhists, rainbows area state of peace and forgiveness. And in some cultures, it is a really long and colorful unicorn. Of course, simply because a rainbow isn't there doesn't suggest we will not explain how it works. The better question is "WHY is a rainbow?"And that answer is "42" Let me explain. A rainbow exists because of light, water and little physics. Let's start with sunlight. It looks white.
To some that looks like the absence of color. But thanks to Isaac Newton we know that white light is really the sum of all visible wavelengths, from short to long and all the colors in between. So we've got light, now we need water. One rainy or misty day, the sky is filled with tiny droplets.
They aren't quite as small because the droplets in clouds, though, which is why we do not have awesome looking clouds. Some of you might be saying "But Joe, I've seen a rainbow in a cloud before! Well, that’s not really a rainbow. But we'll talk about that another time. Those suspended liquid prisms are surface tension on its smallest scale, and they're pulled into the shape of a sphere and each one can catch sunlight and become its own part of the rainbow factory. Here's where we add the physics. Sunlight starts by entering a raindrop from behind you. The light goes from one medium, air, into another, water. And that cause sit to bend slightly because of a process called refraction.
Different wavelengths of sunshine bend at different angles therefore the white light begins to separate. This bent sunlight then reflects off the rear of the raindrop, and refracts again on the answer . When we measure the angle between the light that went in and the red light that comes out, the answer is 42 . . . degrees. So what percentage drops does it fancy make a rainbow? Well, a lot. Because each color exits at a different angle, one raindrop will send red-light into your eye and another drop will send violet light. The same thing happens with all the colours in between, each coming from their own droplet. And what about the shape? We call it a rainbow for a reason. It's not a rain LINE or a rain ZIGZAG.
You and your eyes are at the apex of a huge half-cone, and at the other end is the water that makes the rainbow shape that we all know and love. Everything that you simply see is because that lights refracting right to where you're . No one else is experiencing precisely the rainbow as you. If everyone's rainbow is exclusive , does your rainbow appear as if my rainbow? Well, Michael from Sauce has a great video about that, so I'll put a link in the description to let him answer that question for you. Could we ever see a different rainbow?
We’ve evolved to see only a tiny fraction of a percent of the entire electromagnetic spectrum, what about all the rest of it, from x-rays to radio waves. What if we could see a rainbow like the mantis shrimp, maybe we could see a rainbow that stretches across the sky! Spoiler alert, maybe NOT. While it's true that we only see a sliver of the spectrum, you cannot make a rainbow out of anything that does not make it into Earth’s atmosphere.
Take the sun: It actually emits almost half its radiation right round the visible range, which is strictly why we evolved to ascertain that range. The rest of the daylight is usually infrared and just a small little bit of UV. If we could see a rainbow made of all of that, it would only be about twice the width of the one we're used to.
Unfortunately, if we could see infrared, we'd be blinded by the infrared radiation given off by althea warm things around is, including the Earth itself. Cranking up the sun wouldn't work either because most of the spectrum is filtered out before it reaches surface . What about all those radio waves, they’re traveling freely through the atmosphere. Picture all those bands way beyond the red side of our rainbow.
Sadly, having radio antennas for eyes would even be a blinding experience, because the air is crammed with the signals from our Wi-Fi, mobile phones, and well, radio. I guess we'll have to be happy with the rainbow we have, because it's pretty much the best rainbow we can make. The next time you see a rainbow, remember that even though there's no pot of gold at the end, no one else can see exactly same rainbow you can. That sounds like treasure to me. Stay curious, and thanks for watching..
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