The transparency, translucency, or opacity of an object is determined by its atomic structure and how it interacts with photons of varying energy levels. When photons are absorbed by atoms, they are re-radiated in specific directions, influencing the object's optical properties. Reflection occurs when re-radiated particles exit the same side of the atom that the originals entered. Understanding these interactions is essential for grasping the principles of light behavior in materials.
PREREQUISITESPhysicists, materials scientists, optical engineers, and anyone interested in the properties of light and materials.