The Marvel of Rainbows

[Finalbeta]

Rainbows are definitely among the most beautiful nature's displays, but what are the physics behind?

Turns out that it's rather simple.

A rainbow is an optical phenomenon rather than an actual thing. It also requires water droplets to be floating in air.

The sunlight basically shines on the droplet, and when light passes into the droplet it slows down, in technical terms its phase velocity reduces, since water is denser than air, which also causes light to change direction (also called as refraction or bending).

Different colors of light travel at different speeds when in a medium (in this case the droplet) instead of a vacuum where they may travel at the same speed instead.

Sunlight is made up of many wavelengths (colors) of light. Some of those wavelengths get bent more than others when the light enters the water droplet. Violet (which is the shortest wavelength of visible light) bends the most, Red (which is the longest wavelength of visible light) bends the least. The highter the index of refraction of a color is, the more a color bends. Violet for example bending the most since the index of refraction equals light speed / light phase velocity, hence by this equation the color that bent the most is also the one that slowed down the most inside the droplet.

A dispersion into seven colors occurs as light changes its direction.

Visible light is nothing but a form of electromagnetic radiation and is defined as the wavelengths that are visible to most human eyes. The Rainbow is an optical phenomenon after all.

At that point, after the refraction occurs, a reflection follows inside the droplet and so light changes direction again.

Ultimately another refraction occurs, further emphasizing the original dispersion, and the rainbow is factually formed.

A few tags:
@MangoSenpai @Natalija @Tekashi69420 @Orojackson Refugee @5000 ng/dl or death @Kiwipom @Akai2

 

[MangoSenpai]

:cheers:
Everything in this world is made up of small balls!

 

[Finalbeta]

Few other tags:
@Queen @Oblivion @Enma @Just a member @imacub

:cheers:
Everything in this world is made up of small balls!

 

[Just a member]

The problem I have with that so called crystallized intelligence can be summarized with the english saying "do it or lose it". To make an example there is a ton of subjects I studied at college but now I barely remember anything since from the end of college until today I barely used them (let's say never) so the brain automatically puts them in the back until they are forgotten (even if when you try to recuperate them by studying your notes you can require them faster than the first time you studied them).

 

[Finalbeta]

The problem I have with that so called crystallized intelligence can be summarized with the english saying "do it or lose it". To make an example there is a ton of subjects I studied at college but now I barely remember anything since from the end of college until today I barely used them (let's say never) so the brain automatically puts them in the back until they are forgotten (even if when you try to recuperate them by studying your notes you can require them faster than the first time you studied them).

Yes this is very true.

The brain is capable of superlative feats but its capability to store and retrieve information is limited. As a matter of fact long-term memory can be repressed and lost too, expecially when information is not rehearsed, or also for example as a natural mechanism of the brain to allow new information to be stored. Memories can even funnily compete and interfere with each other provoking loss, expecially when they are similar.

Fluid intelligence also needs to be practiced and it can also be empowered to a significative degree. As a matter of fact it's possible to become smarter by working on it as well, not just by increasing crystallized intelligence.

Fun fact: A study showed that the more intelligent a person, the more neurons they may have, but also the fewer connections there are between the neurons in their cerebral cortex.

 

[SmokedOut]

 

[Warchief Sanji D Goat]

Rainbows are definitely among the most beautiful nature's displays, but what are the physics behind?

Turns out that it's rather simple.

A rainbow is an optical phenomenon rather than an actual thing. It also requires water droplets to be floating in air.

The sunlight basically shines on the droplet, and when light passes into the droplet it slows down, in technical terms its phase velocity reduces, since water is denser than air, which also causes light to change direction (also called as refraction or bending).

Different colors of light travel at different speeds when in a medium (in this case the droplet) instead of a vacuum where they may travel at the same speed instead.

Sunlight is made up of many wavelengths (colors) of light. Some of those wavelengths get bent more than others when the light enters the water droplet. Violet (which is the shortest wavelength of visible light) bends the most, Red (which is the longest wavelength of visible light) bends the least. The highter the index of refraction of a color is, the more a color bends. Violet for example bending the most since the index of refraction equals light speed / light phase velocity, hence by this equation the color that bent the most is also the one that slowed down the most inside the droplet.

A dispersion into seven colors occurs as light changes its direction.

Visible light is nothing but a form of electromagnetic radiation and is defined as the wavelengths that are visible to most human eyes. The Rainbow is an optical phenomenon after all.

At that point, after the refraction occurs, a reflection follows inside the droplet and so light changes direction again.

Ultimately another refraction occurs, further emphasizing the original dispersion, and the rainbow is factually formed.

A few tags:
@MangoSenpai @Natalija @Tekashi69420 @Orojackson Refugee @5000 ng/dl or death @Kiwipom @Akai2

 

[Ballel]

@Finalbeta You really made a thread about rainbows.

Now that you explained the physical part, we still need people who respectively explain the psychological, the socio-cultural, the artistic and the religious aspects of rainbows.

 

[Finalbeta]