Incorrect. A white wall with light that is not white will look white to human perception, changing it to an actual white source will then make the human perception see the complementary colour.
Because the wall is not a light source. It is only reflecting light, and is therefore subject to interference.
This trick is ancient and used in physics classes, at least when you get to university.
I assume this means you've been to University, or are still there? If so, check in with your nearest physics/astrophysics professor about this.
Try this experiment - turn on a red bulb in your room. Does the colour output of your monitor change as a result of the red light? Is it now also tinted red because of the red light bulb?
Yes.
Really? Are you sure?
How else do you think you get a colour spectrum of theoretically 16 million colours from just red, green and blue phosphor/doping on a monitor screen if the colour is not the agregate perception of all photons received from that angle? And since that is the case, the red light photons will make every colour from the monitor redder.
Through interference of light waves. But if you look closely enough at the pixels, you will see that they stay individual Red, Green, and Blue.
Most importantly, the LED's themselves do not change colour in the presence of other colours.
You made this claim based on what you want to be true, not what is.
The good thing is that this is really easy to test. Can you post some picture of your monitor changing colour in the presence of external coloured light sources?
Try it yourself. But remember, the light has to be in the field of view.
I play this game under coloured lights nearly all the time. They do not affect the colour output of my monitor, nor the stars outside.
It gets dark here in about 9 hours from now, so I'll be sure to post some pictures to prove it.
Again,speak to your local Astrophysicist. Or go to an observatory, where they'll typically use red lights so as not to affect the brightness of the stars. The red lights do no affect the perceived colour of the galaxy.
Heck, go outside and look right now. Daylight sky is blue because of the star light. Night skies are orange because of the sodium lights.
But the star colours remain unchanged under all circumstances.
Again, you're making a claim that FEELS correct, but you have fallen for the perception vs reality.
Go look up some work either on psychology or cognitive science or perceptual neurology. They're not easy to get books, but you have an entire internet to learn from.
Alternatively, as I mentioned earlier, employ some empirical experimentation and try it for yourself. You've misunderstood the differing behaviour of lightsources vs light reflecting surfaces.
Nope. It isn't a difference shade. You can take a spectrometer and look at the photons reflected to see the real colour.
Your brain
perceives a different shade because of the change in contrast, but yes - the actual colour remains unchanged. Also, remember, these are not light
sources - they are light reflecting surfaces, which are subject to interference.
The case we are arguing here is that the galaxy background is changing colour, despite being a light-emitting source.
No, it is arguing that the colouring is unrealistic. Light emitting sources, as with monitors, are agregates of other light sources in the field of view, nearby sources of light, perceptual processing, chemical reinforcement and inhibition in both optical sensors and neurolgical wiring, and none of this is pure from one source in anything other than a fake CGI picture.
Again, light
sources do not change colour in the presence of other light sources.
A sufficiently powerful light source may overpower another one, but your local M-Type dwarf star does not have sufficient luminance to tint the entire galaxy.
I think you are really clutching at straws here. The galaxy does not change colour, neither objectively nor subjectively, when you are near a red light source.
That’s an objective fact.
Nope, that's your bare assertion. The galaxy doesn't change colour, but our perception of it does. Look up the word "Qualia".
Qualia: the internal and subjective component of sense perceptions, arising from stimulation of the senses by phenomena.
Subjectivity doesn't change physics.
And your claim there is clutching at straws by pretending reality and projection of personal desire or actual problem to another so that you can proclaim the argument unsound by reason of the person saying it, rather than the argument presented.
Here's a tip for you. Go look at the very red star Betelgeuse. Now look at your incandescent bulb. Which looks redder? Betelgeuse is hotter, therefore whiter, than the tungsten element of a normal household lightbulb at operating temperature.
But, crucially (and this is the point of this whole thread), Betelgeuse's colour is not altered by the presence of my incandescent bulb. Neither subjectively, nor objectively.
The wavelength of h-alpha is set. Our colour perception is not based on the wavelength of the photon given but the aggregate. So we call Sol yellow and Betelgeuse red, despite H-alpha being 100% identical.
In your world, how do you explain that if H-alpha wavelengths don't change, yet both appear in both stars, yet each star is a different colour?
Physics. Individual light sources do not change colour. Light reflected from those sources will change colour due to interference, but if you look directly at the light source itself, it's original colour remains unchanged.
If the light source is too far to be perceived individually, it will blend with other distant light sources due to interference by the time it reaches your eyes. But if the individual light source is close enough to be perceived individually, it will not change colour in the presence of a local light source.
Put a red light bulb and green light bulb net to each other. The light
reflected from those sources will change colour due to interference. The light
sources, however, remain unchanged.
But don't take my word for it - it can be proven empirically. Prove your theory to us with pictures, and I will do the same for comparison purposes as soon as it gets dark here.
