Physical reactions in samples by measuring emitted light. A microplate reader detects light emitted by samples which have been pipetted into a microplate. Emission of light in these samples is the result of a biological, chemical, biochemical or physical reaction. It helps to minimize operational time and to save costs, allowing researchers to dedicate more time to data analysis and generation of actionable insights. It is used for the quantification of several biological and chemical assays. Light-emitting dyes and reagent kits are usually employed to convert a reaction into light and quantify it with the plate reader.