Learn Why Sky is Blue with Froot Loops in 5 min | Color of the Sun and Scattering | Learnability

Learn the fundamentals of why the sky is blue using fruit loops cereal as an analogy. Sun's color is white, not yellow!
Rayleigh Scattering, the Karman Line, Atmosphere, primary colors of light, and UV rays are discussed along with why you can't see stars in the daytime is also explained
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[@raman6090]

Wow 😳

[@RoseUniversity]

I'm amazed too

[@anitabajaj9039]

Explanation for biue sky is very interesting

[@RoseUniversity]

Thanks!

[@nitakumari4670]

Very nice video 👌🏻

[@RoseUniversity]

Thanks a lot

[@reetbedi7617]

I didn’t know we couldn’t see stars in the day cause of scattering, I thought it was because the sun was too bright!

[@RoseUniversity]

Yes, that's usually what everyone thinks! But its similar to looking at a flashlight in the dark in an open area, all you'll see is the light directly coming from it.

[@brindaahuja8283]

Very interesting!! Revisiting old topics with more understanding through your videos.

[@RoseUniversity]

Glad you like them!

[@mannatverma9276]

Wow , it's an amazing video and the way of explaining is too good

[@RoseUniversity]

Thanks!

[@seewatisay]

Such a simple and easy to understand explanation for a common but mysterious question. An answer using fruit loops?! You have my full attention :D

[@RoseUniversity]

Glad you liked it, Thanks!

[@bedivinod80]

So UV light which we can't see also scatters all over the sky like blue?

[@RoseUniversity]

Yes it does! but thanks to the ozone layer at around 15 miles from sea level which protects us from these powerful rays and absorbs it. Just like the famous name brand sunglasses "Ray-Ban" which "bans" UV "rays" from going through it ...

[@victorlavender1688]

So the blue froot loops are the most nutritional? Is that why they take over? Just kidding. Thanks for the simple analogy!

[@shera999]

🤔

[@RoseUniversity]

Thanks

[@Vijay_Nano]

Keep uploading your videos Sir.

[@RoseUniversity]

We will! Thanks for supporting the channel and Roseuniversity.org

[@utube460]

Great explanation ! 👌👌

[@RoseUniversity]

Glad it helped! Thanks for supporting the channel Kaushal

[@logically1028]

Superb...plz make more videos..you explain so perfectly..

[@RoseUniversity]

Thank you, we will

[@jaideepsingh1719]

What is refractive index

[@RoseUniversity]

That's a great question. In my next video on mirages, I will explain "n" or refractive index (or index of refraction) in detail. For now, a simplistic approach to understanding is the following. I am pretty sure you are asking about "Absolute" index of refraction.
If a wave travels at a speed say "y" when it is in vacuum; as soon as it enters any material or matter hence not vacuum it will slow down to a slower speed lets say "z". The ratio or the amount by which it slowed down is y:z or y/z. This is index of refraction. The ratio is usually denoted by "n". Also, "n" is unit-less because the unit of speeds (whichever you use) in the ratio cancel out.
So refractive index n ~ y/z and since y in electromagnetic waves traveling in vacuum is speed of light or "c", then n ~ c/z
Hope this helps

[@harpreetnannu6758]

Sometimes after raining (when rain stops) the sky appears to be orange why is that so? And why the clouds appear to be white sometimes and sometimes they look black?

[@RoseUniversity]

Hi! Brilliant observation and question. First, orange is a result of adding red + dark green (green half way on its brightness) + No blue at all. During sunrises, sunsets, and after it stops raining (depending on the time of day it ends), sunlight (R+G+B) has to travel a greater distance in the atmosphere. Since blue is already scattered away in the sky, the next candidate to scatter away is green! So that results in orange (red + faded/scattered green). As the sun dips more and more towards the horizon, even green fades away to almost nothing and the sky appears red ... All this is a result of Rayleigh Scattering.
Clouds on the other hand appear white also because of scattering BUT in this case its not Rayleigh Scattering but Mie Scattering (not discussed in this video). The difference? It scatters all colors equally unlike Rayleigh scattering. So when R+G+B scatter equally, it results in white going in various random directions wherever there is moisture or water droplets = white clouds.
As more and more Mie scattering occurs, the opposite side of a thicker cloud not facing the sun gets less and less light reach through, so seems darker and darker or appear "black" to an observer on the ground.
Hope this helps!

[@harpreetnannu6758]

Thank you sir.. now I understand the concept 👍
You are the best sir

[@RoseUniversity]

I'm glad it was helpful!