ظاهرة ما بعد الصورة .. كتاب التصوير الملون ، الكاتب عبد الفتاح رياض

Post-image phenomenon:

When you stare at a light source for a short time (half a minute, for example) and then blink

Our eyes, we will perceive another image after a short period of time, and this is called

The last image is called "After Image".

The extent of our awareness of this phenomenon depends, as do the colors of the “post.”

picture, on the following factors:

(1) The color, shape, and intensity of luminance of the first stimulus. By this term, we mean:

The light source or colored surface that we begin to stare at. (b) The color and intensity of luminance of the surface (or floor) to which we have directed our gaze after looking at the first stimulus.

It is usual for a short period of time to pass between the end of staring at the first stimulus, and the appearance of the after image, and this period is known as latency, and this period may be about a second or a little more, and this phenomenon takes a period of time that may last half a minute or a little more than that. . And who may
the other. The retina plays the first role in triggering this phenomenon, as evidenced by the fact that if we closed one of the eyes, we would find that the phenomenon of post-image was limited to the eye that we used in vision without the eye.

It is not necessary to close our eyes in order to feel this phenomenon, as if we stare for a long time at a bright light source or a very luminous surface (colored or white) and then turn our eyes directly towards another adjacent surface: another adjacent one, without

We close our eyes and we also find a continuation of seeing this phenomenon.

Perception of the “beyond image” phenomenon falls into two categories: