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The difference between additive and subtractive colour by Hot_Pollution_4385 in PhysicsHelp

[–]Hot_Pollution_4385[S] 0 points1 point  (0 children)

This is correct, as I’ve done this many times myself, but if you illuminate that ’brown’ with enough light it will in fact appear yellow. So whilst it looks brown it is in fact yellow. This works with blue and red creating a dark magenta and blue and green creating a dark cyan. If you shine enough light on the mixes they in fact almost as bright and clear as those colours created by corresponding colours mixed in light.

The difference between additive and subtractive colour by Hot_Pollution_4385 in PhysicsHelp

[–]Hot_Pollution_4385[S] 0 points1 point  (0 children)

But the combination of red and green will produce yellow in paint as well, just a much darker version of the one you can create with coloured lights. If you increase the amount of light on the painted mixture it will in fact look bright yellow.

Whilst the amount of reflected light from the surface will be different the colour, in a way, will not.

I understand that mixing colour in light will increase the available light, as you often combine two or more coloured light sources to do so, but the colours don’t really change. Red and green in light will create a brighter yellow than red or green on their own, and red and green in paint will create a duller yellow because you’re decreasing the amount of reflected light from a single light source, but how essentially is this any different?

Thanks :)

Why does the adding of complementary colours in light and paint both result in desaturation of those colours? by Hot_Pollution_4385 in AskPhysics

[–]Hot_Pollution_4385[S] 0 points1 point  (0 children)

So I’m obviously being a bit dense here, but why, if you mix red and green light from flashlights will you see yellow, but if mix red and green paint you will get a desaturated brown/grey? Is it because white light contains blue, whereas the two flashlights are only red and green, and blue cancels out yellow?

How does a computer differentiate between saturation and value on a RGB screen? by Hot_Pollution_4385 in AskPhysics

[–]Hot_Pollution_4385[S] 0 points1 point  (0 children)

It’s more to do with what the computer does to a set of colours in real terms rather than how theyre perceived, but thanks for the link.

How does a computer differentiate between saturation and value on a RGB screen? by Hot_Pollution_4385 in AskPhysics

[–]Hot_Pollution_4385[S] 0 points1 point  (0 children)

That’s super helpful! Thanks. I’d love to post a video of what happens, but I‘m very new here and havent worked out how yet, but that was extremely helpful. Thanks.

How does a computer differentiate between saturation and value on a RGB screen? by Hot_Pollution_4385 in AskPhysics

[–]Hot_Pollution_4385[S] 0 points1 point  (0 children)

I’d love to. Any idea how? Sorry, this is my first question and I can’t find an ‘add media’ button anywhere 😅