Isaac Newton had demonstrated, using prisms, that white lights, such as sunlight, are composed of a number of monochromatic components which could then be recombined into white light.
Isaac Newton demonstrase, folosind prisme, că lumina albă, cum ar fi lumina solară, este compusă dintr-un număr de componente monocromatice⁠(d) care ar putea fi apoi recombinate într-o lumină albă.