jodyflorian
- 7
- 0
Hiya,
While learning about photography I've realized that there's something I can't explain with the physics I was taught at school.
What I do know is that pure red, green and blue have specific frequencies. And that combining the colours produces white. And although I don't know exactly why, I've read that red, green and blue together can approximate most colours - it has a limited "gamut" although personally I can't spot the deficiency.
My main questions are...
1) How can those frequencies produce colours at frequencies different to themselves? e.g. yellow
2) And I thought white was the visual equivalent of white noise (broad band) so how can that be produced with RGB?
Has it got anything to do with how the receptors in our eyes work? Back to biology now lol I remember there existing RGB sensitive cells... it's sounding less and less like a coincidence! Does that mean a green receptor would react to frequencies on either side? Just guessing now...
While learning about photography I've realized that there's something I can't explain with the physics I was taught at school.
What I do know is that pure red, green and blue have specific frequencies. And that combining the colours produces white. And although I don't know exactly why, I've read that red, green and blue together can approximate most colours - it has a limited "gamut" although personally I can't spot the deficiency.
My main questions are...
1) How can those frequencies produce colours at frequencies different to themselves? e.g. yellow
2) And I thought white was the visual equivalent of white noise (broad band) so how can that be produced with RGB?
Has it got anything to do with how the receptors in our eyes work? Back to biology now lol I remember there existing RGB sensitive cells... it's sounding less and less like a coincidence! Does that mean a green receptor would react to frequencies on either side? Just guessing now...
Last edited: