/sci/ - Science & Math » Thread #13378218

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Anonymous Sat 10 Jul 17:39:00 2021 No.13378218 View Reply Original Report

Quoted By: >>13378245 >>13378282 >>13378309 >>13378518 >>13378822 >>13378836 >>13378843 >>13380300 >>13380330

Why aren't there purple or green stars?

Anonymous

Anonymous Sat 10 Jul 2021 17:52:45 No.13378245 Report

Quoted By:

>>13378218
God doesnt love color. Thats why.

Anonymous

Anonymous Sat 10 Jul 2021 18:05:53 No.13378282 Report

Quoted By:

>>13378218
Gases

Anonymous

Anonymous Sat 10 Jul 2021 18:15:05 No.13378309 Report

Quoted By: >>13378332

>>13378218
because the universe is mostly hydrogen and even then if you had a giant ball of neon, it would probably never start fusion naturally. And if it did, it would be spending all of its time turning the larger atoms into smaller ones so they can fuse more easily

Anonymous

Anonymous Sat 10 Jul 2021 18:23:39 No.13378324 Report

Quoted By:

The surface of the sun is so fucking bright goddamn

Anonymous

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Anonymous Sat 10 Jul 2021 18:28:06 No.13378332 Report

Quoted By: >>13379441

>>13378309
Neon glows purple when it gets an electric current pushed through it. Stars glow because they are hot. Color of glow caused by heat has nothing to do with material used and is defined by the black body radiation equation.

Anonymous

Anonymous Sat 10 Jul 2021 18:35:57 No.13378352 Report

Quoted By: >>13378806

The answer to OP's question is also in the diagram. Notice that the left of the peak is steep but the right of the peak has a slower slope. That means that if a star has a maximum photon emission in one color (for example yellow) then it must have a strong emmision in all colors on the right (so red) which is caused by the slope on the right. That also means that there is no prefectly yellow star. It must have a mix of red. But there can be an almost perfectly red star because there are no visible colors to the right of red.

Regerding green stars: If you assume max photon emission at wavelength that corelates to green color you WILL get strong emmisions of all colors to the right so you will also get green, yellow and red. All those colors will mix to almost white, You can see that on the diagram where the max wavelength is 580nm which is green. It basically has the same of all colors thus turning it green.

Anonymous

Anonymous Sat 10 Jul 2021 18:37:33 No.13378356 Report

Quoted By: >>13379433

Also reply if you got any questions. I didn't write this essay for nothing faggot.

Anonymous

Anonymous Sat 10 Jul 2021 19:42:30 No.13378518 Report

Quoted By:

>>13378218
Thanks, doc.

Anonymous

Anonymous Sat 10 Jul 2021 21:27:21 No.13378806 Report

Quoted By:

>>13378352
Would a green explosion in space be possible signs of aliens?

Anonymous

Anonymous Sat 10 Jul 2021 21:36:13 No.13378822 Report

Quoted By:

>>13378218
If there were purple and green stars, you'd get your daily dose automatically. You don't, so therefore there are no purple and green stars.

Anonymous

Anonymous Sat 10 Jul 2021 21:40:11 No.13378836 Report

Quoted By:

>>13378218
Black body radiation. Colors you see radiated by hot bodies are basically additive. So you really transition from

Red -> orange + red (orangeish/yellow like our sun) -> yellow + orange + red ? white light.

This is because at hotter temperatures you activate more color modes, essentially.

Anonymous

Anonymous Sat 10 Jul 2021 21:44:59 No.13378843 Report

Quoted By:

>>13378218
Because realistically stars can't contain the combined masses of two universes to glow green.

Anonymous

Anonymous Sat 10 Jul 2021 21:55:43 No.13378870 Report

Quoted By: >>13379440 >>13379443

All stars are pretty much white because they give off wide emission spectrums. The only difference is that for stars that are cooler the peak is shifted to the longer wavelengths and for hotter, the shorter. So you get a warmer or cooler white, like the difference between an incandescent light bulb and an LED one. For green you would need to have a narrow peak focused on only green which would never happen. For what its worth the peak of our sun's spectra actually is right about at green.

Anonymous

Anonymous Sat 10 Jul 2021 22:08:04 No.13378913 Report

Quoted By:

Could green and purple stars be more common in the far future, when more complex elements will be more common, or even constructed and artificial star-megastructures by Kardashev civs?

Anonymous

Anonymous Sun 11 Jul 2021 02:16:32 No.13379433 Report

Quoted By:

>>13378356
I appreciated it anon thanks for the info.

Anonymous

Anonymous Sun 11 Jul 2021 02:18:54 No.13379440 Report

Quoted By:

>>13378870
Neat

Anonymous

Anonymous Sun 11 Jul 2021 02:20:10 No.13379441 Report

Quoted By:

>>13378332
actually they both glow the same colors for the same reason, regardless if its because of heat or electricity. The spectral lines of a noble gas are the same regardless faggot

Anonymous

Anonymous Sun 11 Jul 2021 02:21:44 No.13379443 Report

Quoted By: >>13379499 >>13379593 >>13382088

>>13378870
No, to have a green star you would need the peak on red. And vice-versa, like the sun. The color the star is tells you that it absorbs its complement

Anonymous

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Anonymous Sun 11 Jul 2021 02:52:18 No.13379499 Report

Quoted By:

>>13379443
hmmmm yes of course

Anonymous

Anonymous Sun 11 Jul 2021 03:30:56 No.13379593 Report

Quoted By:

>>13379443
Anon we dont see the reflection of the sun we see its self made radiation

Anonymous

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Anonymous Sun 11 Jul 2021 05:44:03 No.13379802 Report

Quoted By:

Anonymous

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Anonymous Sun 11 Jul 2021 07:54:38 No.13380023 Report

Quoted By:

Anonymous

Anonymous Sun 11 Jul 2021 10:43:59 No.13380300 Report

Quoted By:

>>13378218
Danke Doktor

Anonymous

Anonymous Sun 11 Jul 2021 11:06:25 No.13380330 Report

Quoted By: >>13382388

>>13378218
There are only white stars. We categorize them according to peak spectrum, but no star is actually blue or red or any other color than white.
They are white because they are white-hot, the fusion in their lower layers heat the surface layers to ultrahot temperature thus they glow an extremely bright white.

Anonymous

Anonymous Sun 11 Jul 2021 16:44:37 No.13382088 Report

Quoted By:

>>13379443

I said emission spectrum not absorption spectrum.

Anonymous

Anonymous Sun 11 Jul 2021 18:11:03 No.13382388 Report

Quoted By:

>>13380330
Don't classify things based on how they look on an oversaturated transducer.

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