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Commonly used terms in the Electrical industry.
flicker
(1)the apparent variation of lighting luminance over time to an observer.
(2) the apparent visual interruptions produced in a TV picture when the field (one half of a TV frame) frequency is insufficient to completely synchronize the visual images. Occurs when the field rate is too low and the biologic characteristic of the human eye known as the persistence of vision does not give the illusion of continuous motion. Flicker is eliminated if the field rate exceeds 50 to 60 Hz.
(3) repetitive sags and swells in the electric service voltage, often accompanied by periodic harmonic distortion.
flicker fusion the perception by the human visual system of rapidly varying lights (flicker) as being steady (fused). Flicker fusion is why fluorescent lights and scenes in movies and television appear to have constant illumination.