Jisho

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Noun
1. photometer
Wikipedia definition
2. PhotometerIn its widest sense, a photometer is an instrument for measuring light intensity or optical properties of solutions or surfaces. Photometers are used to measure: Illuminance Irradiance Light absorption Scattering of light Reflection of light Fluorescence Phosphorescence Luminescence
Read “Photometer” on English Wikipedia
Read “光度計” on Japanese Wikipedia
Read “Photometer” on DBpedia

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