Photochemical Reaction

A photochemical reaction is a chemical process triggered or influenced by light. When molecules absorb light energy, their electrons become excited, leading to changes in their structure or how they interact with other molecules. This energy can cause bonds to break, form new bonds, or rearrange, resulting in new substances. An everyday example is how sunlight helps plants produce food via photosynthesis. Photochemical reactions are important in processes like the formation of smog, vitamin D synthesis in skin, and many industrial applications. They demonstrate how light energy can directly drive chemical transformations in nature and technology.