Lysabsorpsjon

Lysabsorpsjon is the process by which a substance takes up light energy. When light interacts with matter, some of the photons can be absorbed by the atoms or molecules of the material. This absorption causes the electrons within these atoms or molecules to move to higher energy levels. The specific wavelengths of light that are absorbed depend on the electronic structure of the substance. For example, a material might absorb all wavelengths of visible light except for green, which is why it appears green to our eyes. The absorbed energy is typically converted into heat, but in some cases, it can lead to other phenomena like fluorescence or phosphorescence. Different materials have unique absorption spectra, which are characteristic patterns of light absorption. This property is crucial in various fields, including chemistry, physics, and biology, for identifying substances, understanding chemical reactions, and enabling technologies like solar cells and pigments. The intensity of light absorbed is often described by Beer-Lambert's law, which relates the attenuation of light to the properties of the material and the path length of the light through it.