Photometer
1. A photometer is a device used to measure the properties of light. Among other characteristics, the luminous intensity, color, luminous flux of a light source can be measured using a photometer.
2. A photometer is an instrument that measures the strength of electromagnetic radiation in the range from ultraviolet to infrared and including the visible spectrum.
Photometers measure light wavelengths and atomic emissions by collecting radiation emitted by the light source. Through a series of steps the photometer converts the radiation data input into a measurement called spectral irradiance. Photometers may be used to measure infrared or ultraviolet light.
Photometers are used in industries ranging from medicine to astrophysics. Brightness, color, and other light characteristics may be measured using photometers. For example, a cytophotometer is used to measure the intensity of light passing through parts of a cell. In contrast, a spectrophotometer is used to measure and compare wavelengths between light sources.
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