I've been learning about the properties of light in school without quantum mechanical aspect of it. Now that I'm in college I'm looking to learn quantum mechanics and know about light in a different perspective. Now this troubles me:- I've been taught about light in the following way - Some properties were explained using wave equations and some assuming it behaves like a particle. Of course in reality nothing is true. Only the schrodinger equation perhaps best explains the properties of light. So why were the wrong things taught before. Now I have to unlearn everything right?