Imaging principle of color film

Problem description:

I know that the basic principle of color film is the tricolor principle. The red, green and blue photosensitive materials are sensitive to light, but if the object emits pure light of other colors, such as purple light, then the color film can't reflect purple and become black and white?

Also, I know that we can display all kinds of colors with color cameras. According to the principle of trichromatic light, it is because the photosensitive material perceives the red, green and blue light of the subject. Is the color we usually see also the composite effect of three primary colors, not the effect of pure light?

Analysis:

I don't think there is much pure light in this world, most of which are compound effects.

"Is the color we usually see the effect of three primary colors, not the effect of pure light?"

I think it should be.