朗伯比尔定律（lambert-beer law）.docVIP

朗伯比尔定律（lambert-beer law） lambert-beer law The Lambert (Lambert) law states that the ratio of light absorbed by a transparent medium is independent of the intensity of incident light, and that each equally thick layer absorbs light of the same value on the optical path. Catalog 1 concepts 2 Formula meaning 3 range 4 deviation reasons 5 Influence 6 origin of development 1 concepts Also known as Bills law, and bill law Lambert Bills law, Bills Law (Bouguer Lambert - Bouguer - Lambert - Beer law), is the basic law of light absorption, applicable to all electromagnetic radiation and absorbing material of all, including gas, solid, liquid, molecules, atoms and ions. Bill Lambert law is the quantitative basis of spectrophotometry, colorimetric analysis and photoelectric colorimetry. The amount of light absorbed is proportional to the number of molecules that produce light absorption in the optical path. 2 Formula meaning Log () = epsilon Cl (1 - 4) The formula and respectively through the sample after the incident light and transmitted light intensity; log (Io/I) is called the absorbance (absorbance) formerly known as optical density (optical density); C L for sample concentration; optical path; E as a proportional coefficient of light is absorbed. When the concentration is molar concentration, epsilon is the molar absorption coefficient. It is related to the nature of the absorbing material and the wavelength of the incident light. When an ultraviolet absorbing substance is unknown, its absorption intensity is available Longbow Bills law diagram (1) Show: (1 - 5) The formula is that C is the number of solute in lOOml solution; B is the optical path, in cm; A is the ultraviolet absorption produced by the solution; An absorption that indicates the LCM optical path and the concentration of the substance is lg/lOOmL. mathematical expression A=lg (1/T) =Kbc (A is the absorbance; T is the transmittance; that is the ratio of the transmitted light intensity to the incident light