Also Known As: Strobing, Nyquist Limit. The visual interference patterns between a shot's frame rate and a filmed object's periodic motion or change. If a shot is filmed with a frame rate R, any images of periodic events of a frequency greater than R/2 (the "Nyquist Limit") will be misrepresented on film. A commonly-occuring example of this artefact is the illusion of spoked wheels appearing to turn in the wrong direction or at the wrong rate. Incorrect frame rates and synchronisation can also cause strobing during shots of projected movies or of television screens. See also artifact, judder.