Why are Apples Red? (Why is a Red Apple Red?)

Why is an Apple Red? Video shows how coloured light mixes to produce secondary light colours and how light behaves with coloured filters and coloured surfaces. Shout Out to: The Physics Classroom Interactives: https://www.physicsclassroom.com/Physics-Interactives/Light-and-Color/RGB-Color-Addition https://www.physicsclassroom.com/Physics-Interactives/Light-and-Color/Color-Filters https://www.physicsclassroom.com/Physics-Interactives/Light-and-Color/Filtering-Away