Question

give one word for the following ..
the property of our eyes that makes us perceive a rotating coloured disc as white​

Answer 1

Persistence of vision traditionally refers to the optical illusion that occurs when visual perception of an object does not cease for some time after the rays of light proceeding from it have ceased to enter the eye.The illusion has also been described as "retinal persistence","persistence of impressions", simply "persistence" and other variations. According to this definition, the illusion would be the same as, or very similar to positive afterimages.