/sci/ - Science & Math

not much

>>7088144
Tell me how photos came into existence to create the color Yellow

>>7088146
photons*

>>7088146
the photons they vibrate.
How they vibrate makes the colour yellow

>>7088166
Is there any reason to why there is a law that makes photons exist? Are they a vital part of the Universe's existence?

Or is it a multiverse answer, where this universe happened to get photons while some other universe didn't.

>>7088169
The existence of the electromagnetic force?

>>7088133
It's the best color and anybody who disagrees doesn't even have the mental capacity needed to collapse a wavefunction

>>7088176
So like, lightning wouldn't exist?

>>7088177

>>7088169
>Or is it a multiverse answer, where this universe happened to get photons while some other universe didn't.
damn man, you've never had physics classes have you

OP here

Let me see if I can get this straight

>Universe comes into existence
>Pure energy
>Hot, dense, expanding
>Energy turns into quarks
>Quarks combined into photons, protons, neutrons, electrons
>They combined and make hydrogen and helium atoms
>Atoms make stars
>Stars produce wide range electromagnetic radiation
>Eyes evolve to interpret a certain wavelength as Yellow

>>7088188
Yeah, multiverse is where each verse has different laws of physics, and we just happen to be in one that's "fine tuned for life™"

>>7088196
no

>>7088192
The same can be said about all colors but magenta.

Magenta is a complete creation of the human mind.

>>7088200
Yes sir

>>7088203
That's not how the multiverse theory works.

God made yellow first because it's the color of the sun

>>7088204

>>7088192
Ring nebulas look so fucking awesome. I wish I was smart enough to understand some of astrophysics' proofs. Some of it just feels so dense.

>>7088213
Bro, that's a whole ring GALAXY

>>7088192
That picture always cracks me up. Ring galaxies are not particularly common, but in that picture you have a ring galaxy (reddish one at 1 o clock) right inside the ring of another ring galaxy. That's just so weird.

>>7088218
I think those may be the only two ring galaxies ever discovered.

Proof of God?

>>7088224
There are more of them.

Yellow is pretty gay

>>7088374
So are you. :^)

>>7088133
in additive color (light), yellow is a secondary color composed of equal parts red & green light

in subtractive color (pigment), yellow is a primary color alongside cyan & magenta

additive color is every pixel of light you've ever seen

subtractive color is every droplet of ink

>>7088378
So only three singular wavelengths exist? That is to say, red, green, and blue?

And every color is a combination of these wavelength in terms of additives?

And then pigments would just be the substances used to manipulate additive color, right?

>>7088386
No there are waves of every colour. That's just how screens and printing is done

>>7088392
All but magenta, right?

So then, even down to the slightest nanometer, there is an exact, singular wavelength, for, say, lime green?

Why is it that with screens, we utilize just RGB, but in printing, we use those other three? What makes those 3 better for printing, and vice versa?

>>7088395
No.

>>7088417
"No," to which part, exactly?

>>7088386
No, what he meant is that a screen produces only 3 different wavelengths, and these wavelengths are added with varying ponderation in every pixel to display the color you want.

>>7088426
This is because a screen isn't a perfect black body, yes?

>>7088395
These are good questions, color perception is an involved topic.

Another thing nobody has said about yellow: it has wavelength 570-590 nanometers.

>So then, even down to the slightest nanometer, there is an exact, singular wavelength, for, say, lime green?

Not necessarily, some colors like yellow are a single pure wavelength, but others are a mixed spectrum. For example, Lime Green has an RGB representation of 50-205-50, mostly green but with touches red and blue (lower and higher on the spectrum than green) which has the effect of making it "look" lighter. Yellow is 255-255-0 RGB, because yellow falls right between red and green in the spectrum.

>Why is it that with screens, we utilize just RGB, but in printing, we use those other three? What makes those 3 better for printing, and vice versa?

RGB (light mixing) is additive, CMYK (pigment mixing) is subtractive. The three colors CMY are a direct inverse to RGB. But why better? I'm not sure. There are good articles on the web about this.

also, >>>/gd/ should know a lot about color spaces

>>7088449
goddamn I love this board

this happy attitude I'm displaying probably makes me sound like a legit autistic geek, but ever since I've started coming to this board daily and just having discussion with people and posing questions, slight problem solving, etc, I feel a lot better

before I was just going to /pol/ and shit and mentally debating my power level because I was convinced political discussion was still possible there

and being autistic on /vg/, I've sort of given up vidya, or at least, I have no urge to play it any longer

>>7088202
what about brown?

>>7088507
What about it?

>>7088395

No. COLOR IS NOT WAVELENGTH. Color is the ratio in which your three types of color receptors are stimulated. Any given color can be produced an infinite number of ways. MOST can be produced using a single wavelength, but that rarely occurs in nature. Most of the time when you're seeing yellow it is being produced by a wide range of wavelengths, *not necessarily including* the the "yellow wavelengths" that could produce monochromatically.

>>7088514
like magenta, it doesnt correspond to a wavelength - it exists only as a creation of the mind

>>7088521
Well yes, I know what color is, to an extent. I know that light does not physically possess such qualities. But it is the differing wavelengths that we perceive as color.

>>7088537
No it isn't.

>>7088177

>>7088553
>No it isn't.

What do you mean? what wavelength does brown light have?

>>7088553
>But it is the differing wavelengths that we perceive as color.

But it's not, that's the point. Yellow is not a wavelength.

>>7088559
It's a high wavelength of yellow, orange, or red. It covers a wide range of it.

>>7088563
https://www.google.com/search?sourceid=chrome-psyapi2&ion=1&espv=2&ie=UTF-8&q=visible%20light%20spectrum&oq=visible%20light&aqs=chrome.0.0j69i57j0l4.1706j0j7

So then, why the fuck is it listed there with a specific wavelength?

>>7088568
>yellow, orange, or red

so not brown?

>>7088568
>So then, why the fuck is it listed there with a specific wavelength?

Because that wavelength by itself will produce yellow. However, there are also many other ways to produce yellow that don't require that wavelength. Your computer monitor produces all colors using just ratios of three different wavelengths, for example. You have probably never seen one-wavelength yellow, in fact.

>>7088537
>brown only exists as a creation of the mind
and the colon

>>7088192
Yes.

All matter is energy. All energy is matter. They both are interchangeable and the universe can transmute energy into particles of matter, and particles of matter into energy once a certain set of conditions arise.

For instance, an electron in a particular atom has more energy and is in a higher orbital than it should have in it's lowest allowable state (its most stable state) in said atom. To become stable again, it must release that extra energy to return to a lower-energy orbital (again, it wants to be as stable as possible). So this unstable electron spits out energy which is turned into a photon. Tada, you have your photon.

Now if you want to know HOW the universe turns said energy into that photon, then get yourself into a university.

>>7088674
Pure bullshit post

>>7088704
In what way?

>>7088704
I like how stubborn materialists hate the notion that everything is reducable to vibrations and wavelengths, like this threatens them somehow...

>>7088704
So what you're saying is e=mc^2 is incorrect?

>>7088586
No shit you fucking autist, all photon-production mechanisms will produce a distribution of wavelengths across a certain range. You'd define yellow down to a level where a change in wavelength is imperceptible like, I have no idea, .1 nm or something.

>>7088743
I'm not saying "yellow photons aren't yellow", I'm saying that "yellow is not a wavelength."

This can be made obvious by the fact that yellow can also be made by green and red photons.

Yellow is a perception of color that can be triggered both by photons of a certain wavelength range, AND mixtures of other wavelengths. And by hallucinations, direct electrical stimulation of the optic nerve, and other brain fuckery.

>>7088743

Way to completely miss the point. It's not about bandwidth. It's about the fact that yellow does not correspond to a wavelength or a range of wavelengths. Notice how your monitor can make yellow even though it can't produce light anywhere near that wavelength.

>>7088750
>>7088753
Yeah I did miss the point, but the physics should not even be a part of it since you guys are talking about neuroscience.

>>7088721
Not that guy but it is bullshit.

>matter IS energy/energy IS matter
No they aren't the same, just because they can be converted into one another does not make them the same thing.

>Once a certain set of conditions arise
Matter to energy/energy to matter transitions happen randomly all the time

>For instance, an electron in a particular atom has more energy and is in a higher orbital than it should have in it's lowest allowable state (its most stable state) in said atom. To become stable again, it must release that extra energy to return to a lower-energy orbital (again, it wants to be as stable as possible).

Completely wrongly worded. You would say it's in an excited state, the energy is defined by its orbital, not even use this wishy-washy stable term. Poor explanation based on the electron desiring to change state which "must" do this and that. No reference to magnetism, the charge of the electron or its angular momentum, which would demonstrate an understanding beyond highschool level.

>So this unstable electron spits out energy which is turned into a photon. Tada, you have your photon.

"Spits out energy which is turned into.." yeah this guy definitely knows what he's talking about. Don't concern yourself with maxwell's equations or accelerating charged particles or Schrodinger's equation or any of that.

>Get yourself to a university
Yeah, you should, before you post on sci again.

Our Sun is a yellow dwarf. But our eyes can't see the color yellow. How can we see during the daytime? And how do we know the Sun is yellow if we can't see the color yellow?

>>7088794
But How Is The Sun Real If Our Eyes Aren't Real?

>>7088581
No, it's still brown.

That's literally what brown is, an extreme high wavelength of those colors. Come on man.

Statistically, it is the yellowest of all colors known the humankind. While there may be a more yellow color discovered in the future (similar to how after much theoretical computation, the color ultraviolet was hypothesized as a color even more violet than violet, and was eventually discovered), an 'ultrayellow' has no theoretical evidence for existence, and thus yellow is likely to be the yellowest yellow to exist in the universe.

>>7089400
False. Yellow is in the middle of the spectrum, so whereas infrared is lower than red, and ultraviolet is higher than violet, the hypothetical über-yellow is exceedingly average. I think this is known as mellow-yellow in scientific circles.

>>7088133
between red and green on the spectrum