fotokemiaan

Fotokemiaan is a Finnish word that translates to "photochemistry" in English. It refers to the study of chemical reactions that are initiated by the absorption of light. This absorption of light energy can lead to the excitation of electrons in molecules, making them more reactive and capable of undergoing chemical transformations.

Photochemical processes are distinct from thermal reactions, which are driven by heat. In photochemistry, the energy input comes directly from photons of light. The wavelength of the light is crucial, as different molecules absorb specific wavelengths. Once a molecule absorbs a photon, it enters an excited state. This excited state can then lead to a variety of outcomes, including bond breaking, bond formation, or energy transfer to other molecules.

Examples of photochemistry are abundant in nature and technology. Photosynthesis, the process by which plants convert light energy into chemical energy, is a prime example. In the human body, the visual process involves photochemical reactions in the retina. Industrially, photochemistry is used in processes such as the curing of inks and coatings, the synthesis of pharmaceuticals, and the degradation of pollutants. Understanding fotokemiaan allows for the development of new materials, more efficient energy conversion systems, and innovative chemical synthesis methods.