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The flicker fusion threshold, also known as critical flicker frequency or flicker fusion rate, is the frequency at which a flickering light appears steady to the average human observer. It is a concept studied in vision science , more specifically in the psychophysics of visual perception .
It's just to trick the mind. 24 frames being shown per second is actually very jerky. 48 is more asthetically pleasing. In fact 24fps is not at all jerky (it exceeds the motion fusion frequency) but the flicker is unacceptable. Showing each frame twice reduces the flicker, but adds motion artefacts.
The Wonder of Being Human: Our Brain and Our Mind. New York, N.Y.: Free Press. ... Robinson, D. N. (9 January 1970). "Critical Flicker-Fusion of Solid and Annular ...
Further elaborating, Bakker cites the phenomenon in psychophysics known as flicker fusion (or flicker fusion threshold), the point at which consciousness perceives a light as steady. This phenomenon is widely exploited in the modern human environment from light bulbs to screened devices and brings about similar explanatory power akin to Bakker ...
Up to about 80 Hertz or the flicker fusion threshold it is called visible flicker. From about 80 Hertz to 2000 Hertz it is called the stroboscopic effect (this article). Overlapping in frequency, but from 80 Hertz up to about 6500 Hertz a third effect exists called the phantom array effect or the ghosting effect , an optical phenomenon caused ...
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The flicker of a CRT monitor can cause various symptoms in those sensitive to it such as eye strain, headaches [9] in migraine sufferers, and seizures in epileptics. [10]As the flicker is most clearly seen at the edge of our vision there is no obvious risk in using a CRT, but prolonged use can cause a sort of retinal shock where the flickering is seen even when looking away from the monitor.
Operation Midnight Climax was an operation carried out by the CIA as a sub-project of Project MKUltra, the mind-control research program that began in the 1950s. It was initially established in 1954 by Sidney Gottlieb and placed under the direction of the Federal Bureau of Narcotics in Boston, Massachusetts with the "Federal Narcotics Agent and CIA consultant" [1] George Hunter White under the ...