Does natural light when it hits an object cause transition of electrons between energy states and depending on the chemical composition of the material (hence the size of the transition) determine which colour we see? So everything around us is emitting light (photons)? Everything around us is being excited by light and emitting its own intrinsic light? I understand there is a reflection of certain wavelengths of light that depends on the absorption and reflective properties of the material, but I'm trying to understand this from a quantum point of view. Thanks for any ideas.