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Lol I hope the idea of the sun being (slightly) yellow doesn't fall into the area of conspiracy theory my friend
Lol, goodness no.
The conspiracy theory comments were in response to GaryN.
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I remember looking up why no stars were green or purple once- something about stars that peak in the green area also have a large quantity of other colors in their spectrum too?
That is a part of it. Stars emit a blackbody spectrum
, whose peak wavelength is a function of temperature. The sun peaks in green but it also gives off lots of other colors, which our eyes integrate as white.
Hotter stars may peak in blue, violet, or even ultraviolet, but in all cases they still give off all the other visible colors in decreasing amounts, and to our eyes the combination of colors trends toward blue more than purple. You can see this with the graphic posted above -- the curve in color space traces out the perceived color of a blackbody emitter as a function of temperature.
The reason for this is that our eyes are not equally sensitive to all colors. We're vastly more sensitive to green light than to purple -- in fact the sensitivity drops off very quickly as you move to either side of green. So even if there is more violet light in a very hot spectrum, the blue and green light weighs in more to what our eyes interpret.This unequal sensitivity of our eyes to different colors is a neat thing to demonstrate, and you can do so if you have lasers of different color but equal power output. I have a 405nm (violet and very close to ultraviolet) laser, and a green (532nm) laser, both of ~120mW, but the violet one appears much fainter -- even to the point that it doesn't appear dangerous, yet it is intense enough to be felt against bare skin.
I know, I just thought it would be rather funny if someone created a conspiracy theory based on the sun being a radically different color than what billions of people know it to be- let's say someone said that the sun was really purple with pink polka dots lol.
Agh, you are so lucky! I wanted to do an experiment but not sure it can be done. I have chandeliers that act like prisms and create rainbows on my walls (and on my TV- where the colors appear particularly contrasty because the screen is black when turned off.) I know that camera sensors can detect colors we cannot- more on the infrared end of the spectrum, but also on the ultraviolet end. I was thinking of using both a UV403 filter and an IR720 filter to filter out visible light and see if I can detect the "invisible" parts of the rainbow with the camera. Not sure if it's possible because cameras have blocking filters on them. I can do IR photography- but the camera's blocking filter removes about 8 stops of IR light, and on the other end of the spectrum, about 13 stops of UV light. I do get that neat phosphorescent effect with green foliage though and those amazingly contrasty sky colors. By the way this same blocking filter is a bit of an inhibitor when it comes to astrophotography of H-alpha emission nebulae, which radiate mostly in the far red end of the spectrum.
This color stuff is really interesting and I researched it for a long time. Some of the amazing things I found out is that although most of us humans have three types of cones to detect color (thus three primary colors), some lucky people have a fourth type of cone (four primary colors!) so they can actually see more color than normal people can? And who said that superhumans didn't exist
There are some people who only have two types of cones and they see less color and have color blindness (the most common type of which is red-green- which unfortunately are the colors of our traffic lights) but there are now glasses to correct for that.
On the other end, there are some rather amazing crustaceans that have up to 13 types of cones- who knows how many colors THEY can see! Some of these are rather intelligent squid who can also change color depending upon their emotions.
Another species that can see colors we can't are bees and other pollinators- what's fascinating here is that flowers that want to attract them display hidden patterns on their petals that can only be seen in the UV range which these bees can see and we cannot. But with that UV403 filter we can actually capture these hidden patterns of invisible light with our cameras
Just have to use a tripod because of that blocking filter.
I was told not to do UV photography of any bright UV sources because the energy of the UV rays will start to fade the camera's Bayer color filter array- similar to how sunlight can make furniture and wall colors start to fade.
And then there is the whole topic of "Imaginary colors"- colors which technically should not be possible but some people still report being able to see them (perhaps these are the people with the extra types of cones?)