Red+green=?

[Mr. Cucumber]

In computer color red plus green is yellow but when you mix red a green paint it's black... Why?

[seon123]

Computer screens emit light, paint absorbs light. 

[zassou]

In computer it's adding different wavelength of light. But in paint, the colour you see is the wavelength that's not get absolved by the paint, it's reduced light. 

[mr moose]

The yellow is trick played on your eye by the monitor.

 

https://www.livescience.com/17948-red-green-blue-yellow-stunning-colors.html

https://visual.ly/blog/the-use-of-yellow-in-data-design/

[dalekphalm]

8 minutes ago, Mr. Cucumber said:

In computer color red plus green is yellow but when you mix red a green paint it's black... Why?

https://www.xrite.com/blog/additive-subtractive-color-models

 

Read this. As others have mentioned, it's because paint reflects light (we're seeing the light that isn't absorbed by the paint), whereas with monitors, they emit light themselves.

[Mr. Cucumber]

2 minutes ago, dalekphalm said:

https://www.xrite.com/blog/additive-subtractive-color-models

 

Read this. As others have mentioned, it's because paint reflects light (we're seeing the light that isn't absorbed by the paint), whereas with monitors, they emit light themselves.

To the wavelengths superposition together into a new wavelength and a new frequency? 

[dalekphalm]

1 minute ago, Mr. Cucumber said:

To the wavelengths superposition together into a new wavelength and a new frequency? 

No, I don't think adding colours together makes a new wavelength/frequency. The specific individual components (eg: a red light and a green light) are still there, emitting light in their respective frequencies.

 

Though I'm not a specialist in light/colour theory, so hey - maybe I'm wrong about that detail.

[mr moose]

2 minutes ago, Mr. Cucumber said:

To the wavelengths superposition together into a new wavelength and a new frequency? 

basically (in a very basic explanation) the monitor emits a certain intensity of red and a certain intensity of green and no blue,  In the absence of blue the eye interprets the difference between red and green as yellow.

 

I am not a specialist but I have read/learned a lot (read: and absolute ass tonne) of work on sensory perception in my work with autism.

[zassou]

Since human eyes only sees 3 colours, yellow is just two peaks on the continuous wave. 

 

Check Vsauce' video