How the ‘rubber pen’ trick works when you hold a pen loosely in your fingers and move it up & down rapidly that it looks like it bends

Question

How the ‘rubber pen’ trick works when you hold a pen loosely in your fingers and move it up & down rapidly that it looks like it bends

In: Biology

Answer 1

The way it was explained to me.

We do not see “in video” but in numerous still photos. The moving pencil trick works in the same way as wagon wheels with frame rates in older movies. Check it out.

Think of our vision as a giant, live, flip book. Look in a mirror and try to see your eyes move.