fényabsorpció

Fényabsorpció is the process by which a substance takes up light energy. This occurs when photons, the particles of light, interact with the electrons in the atoms or molecules of the substance. If the energy of the photon matches the energy difference between an electron's ground state and an excited state, the electron can absorb the photon and transition to a higher energy level. The absorbed energy is then typically converted into heat or re-emitted as light of a different wavelength, a process known as fluorescence or phosphorescence.

The specific wavelengths of light that a substance absorbs depend on its chemical structure and the energy levels available to its electrons. This selective absorption is responsible for the perceived color of objects. For instance, a green leaf appears green because it absorbs most wavelengths of visible light but reflects or transmits green light. Fényabsorpció is a fundamental phenomenon with wide-ranging applications in fields such as solar energy conversion, photosynthesis in plants, and the development of pigments and dyes. Understanding fényabsorpció is crucial for many scientific and technological advancements.