Persistence of vision

This is the phenomenon of the eye by which as afterimage is thought to persist for approximately one twenty-fifth of a second on the retina.

A good way to show the persistence of vision is with a thaumatrope:

What a thaumatrope is a scientific toy which was created in the 19^th century, which consisted of two disc with different images on each disc and the way that it works is when the discs are spun, you let it unwind and you see the two images on one disc.

First I mounted the images on to cardboard and after I did that I cut out around the two images.

After I cut out the two images I stuck them together and cut out the holes and put string through them so that I could wind up and see the two images together.

The way that it works it is an optical allusion and because the eye cant process the two images and two different ones when it is moving quickly so that is why you can see the two images as one and only when it starts to slow down you see the two images separately.