red, green, blue?

[alan2here]

X Rays, UVLight, , Infer Red, Microwaves

 

Take a sheet of paper and shine red light onto it, then shine green light onto the same place, the result is yello light.

The elecromagnetic frequency for yello light is half way between red and green

 

If instead you shine red and blue light you get purple, however green is half way in turms of frequency between red and blue, not purple.

 

To me this makes little sence?

 

This got me wondering weather someone could tell the difrence (for example) between light at the frequency for yello and equal amounts of red and green light (also making yello).

[insane_alien]

we only have 3 colour receptors in our eyes, red, green and blue.

 

this does not mean that when we detect yellow light, we see yellow, it means that our red and green receptors are activated because the reception is pretty broad. the brain interprets this as yellow but the eyes are saying red and green, no blue.

 

when you see blue and red, the eyes say blue and red, no green. so your brain won't interpret that as green. it will interpret it as purple.

 

people can't tell the difference between continuous spectra and mixtures of the three colours. for example, the screen your looking at right now only has 3 colours(i don't care if it says"32 million colours" on it anywhere its only got 3. it just varies the intensity and combination of those three into 32 million variations

[alan2here]

Thanks :¬)

 

Now I Understand

 

I had the assumption that the eye mesured the freqency of each photon of light entering it.

I now know that there are 3 types of colour receptors in out eyes, red, green and blue. Which is why we get duped by purple and can't tell orange (red + yello) from orange.