Color mixing
Can pure (monochromatic) colors be produced by additive mixing of the three colors red, green, and blue?
Metameric colors
Imagine a color sensor with three channels, red, green, and blue, that has either a spectral sensitivity corresponding to line sampling (Fig. 6.3a) or to band sampling (Fig. 6.3b) in Section 6.2.3. For each of the two sensor types, indicate at least three spectral distributions, which should be as different as possible from each other, that result in the same color perception.