Light-Matter Interaction

Light-matter interaction refers to how light (photons) interacts with substances (atoms and molecules). When light hits an object, it can be absorbed, reflected, transmitted, or refracted. This interaction determines the object's color and transparency. For instance, a red apple appears red because it absorbs other colors of light and reflects red. In more advanced contexts like quantum physics, this interaction is crucial for understanding phenomena like lasers, solar energy, and even how certain materials can emit light, as seen in fluorescent substances. Ultimately, light-matter interaction is fundamental to many technologies and natural processes.