Friday, 12 October 2012

Bird in a cage


Persistence of vision

Twirling disc super imposes images upon each other by means of perpetual phenomenon known as the persistence of vision Our eyes hold on to images for a split second longer than they are actually projected so that a series of quick flashes are perceived.
This means that when you move the image fast enough your eyes hold the image of the bird and you will see the bird in the cage. Examples of this are shown in the images below.


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