Understanding the role of uv digital photometers

What is a photometer? A uv digital photometer is a device that takes measures of intensity of light and optical characteristics of surfaces and solutions. Photometers measure: fluorescence, absorption of light, light reflection, illumination, irradiance, phosphorescence, luminescence, and scattering of light. Anciently, photometry took place using eye estimation before electric light sensitive devices came up. […]