Photometry

Is a branch of physics that studies the dependence of the photometric characteristics of a physical object under the influence of a light flux incident on it. Photometric characteristics include brightness, color gamut, illumination and spectral composition of light. The luminous flux that causes photometric effects is called the emitter or light source, and the light reflected or absorbed by an object is called its light. Photometric analysis can be performed using photometers that measure the intensity of light of different wavelengths simultaneously. The measurement results make it possible to study the relationship between different wavelengths of light and its photometric characteristics, such as luminous flux, brightness and color spectrum. The concept of photometry arose in the study of primary phenomena inherent in the interaction of electromagnetic waves in the optical range and material media.