0_Apprentice
Red is such a pretty color, don't you think?
1_Wizard
I like that its wavelenght is 625-740 nanometres.
0_Apprentice
Oh wow! That's a new one for me! How many different shades are there?
1_Wizard
I am not sure but red is a primary color.
0_Apprentice
Yep, along with yellow and blue right?
1_Wizard
Yes, the RGB color model is an additive color model.
0_Apprentice
Don't they use that in old projection tvs to produce the screen images?
1_Wizard
I think so, the main purpose of the RGB color model is for the sensing, representaion and display of images in electronic systems.
0_Apprentice
Cool, cool. So what colors mix with red to make other colors?
1_Wizard
I am not sure, but red is a important color in China.