eli5 how do those illusion videos work where you close your eyes after staring at a dot and are able to see the picture?
In: 0
It’s called image persistence or image retention, basically the cells in your eyes that pick up light can only switch signals as fast as 1/30 of a second which is why movies look like their moving even though they’re a series of still images. Now then you stare at something for long enough youl get an after image as a part of the image is retained even longer by the cells.
Latest Answers