Absorptionsgeschwindigkeit

Absorptionsgesetze, or absorption laws, is a term used in several disciplines to describe quantitative relationships that relate how a medium absorbs energy, radiation, or particles to observable properties such as concentration, path length, frequency, or material coefficients. It is not a single universal equation, but a family of principles that model attenuation in different contexts.

In optics and spectroscopy, the Beer-Lambert law is the most widely cited example. It states that the intensity of light I passing through a sample decreases exponentially with the product of the molar absorptivity, concentration, and path length: I = I0 e^(-εlc). The corresponding absorbance A = εlc is used to quantify how much light is absorbed. This relationship is most reliable for monochromatic light, dilute solutions, and media with minimal scattering or chemical change under illumination; deviations occur at high concentrations or with complex spectra.

In acoustics, absorption laws describe how sound energy is attenuated as it travels through materials or air. An absorption coefficient or sabin unit measures how much sound is absorbed per unit thickness. The overall effect can be described by an exponential decay of sound intensity with distance, and room acoustics often use the Sabine formula to relate reverberation time to the total absorption of a space.

In other areas, absorption can refer to uptake of substances by a medium, radiative transfer in atmospheric and planetary contexts, or attenuation of particles in detectors. Common limitations include scattering, non-uniform media, and non-monochromatic sources.