Persistence of vision.

What is persistence of vision?

Persistence of vision is the illusion of movement using slightly different shots.

A good example of this would be if i animated a character of mine waving.

First shot would be the character preparing to wave. second shot, The character would start to wave. Each frame will be slightly from the previous in the movement of the characters' hand, depending upon fast or slow my character is moving will impact on how many frames will need to be used, i.e: if the character is slowly waving then that will use more frames. However, if my character was waving quickly then less frames will be needed.