Tag: Radiant power

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Illuminance

The illuminance Ev (“v” for visual) is the photometric equivalent of the irradiance Ee in radiometry. Photometric quantities and units describe visible light according to the physiological perception of brightness by the human eye. Accordingly, the illuminance is equal to the irradiance in the spectral range of the human eye. Colloquially, it describes the “intensity” […]
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