how long does the impression of an oblect present on retina ? how eye perceves objects as moving?
Answers
An image stays on the retina for about 1/16 of a second. This feature is called persistence of vision. Due to this, when many still images are shown in a sequence; they give the illusion of moving images. Movies and animation are made by exploiting this property of the human eye.
Whenever light strikes the retina, the brain retains the impression of that light for about a tenth of a second—depending on the brightness of the image—after the source of that light is removed from the eye. This is due to a prolonged chemical reaction. As a result, the eye cannot clearly distinguish fast changes in light that occur faster than this retention period. The changes either go unnoticed or they appear to be one continuous picture to the human observer. This fundamental fact of the way we see has been used to our advantage.
The impression of any object on retina persists for about 16th part of the second.
Our eyes perceive any object as moving when the position of the object changes 16 or more than 16 times in a second.
HOPE IT HELPS.
The impression of any object on retina persists for about 16th part of the second.
Our eyes perceive any object as moving when the position of the object changes 16 or more than 16 times in a second.
HOPE IT HELPS.