👉 Light-particle interaction, often referred to as light-matter interaction, involves the study of how photons (light particles) interact with various particles, such as electrons, atoms, or molecules. The process typically begins when a photon, carrying energy proportional to its frequency, approaches these particles. Depending on the energy and properties of both the photon and the particle, several outcomes can occur: absorption, where the photon's energy is transferred to the particle, exciting it to a higher energy state; emission, where the particle releases a photon as it returns to a lower energy state; or scattering, where the photon changes direction without altering its energy. These interactions are fundamental in understanding phenomena like photosynthesis, spectroscopy, and the behavior of light in different media. Techniques such as photoelectron spectroscopy and Raman scattering exploit these interactions to analyze material properties and molecular structures.
