среда, 17 января 2018 г.

Vintage Animations

How do movies move?

Concepts: persistence of vision, perception

Skills: planning, observing

What you need
Glue or stapler
Paper strip
Pencil or marker
Straw

What to do!
1. Cut paper into a strip approximately 8 x 24 cm.
2. Fold paper in half so it forms a card.
3. On one side, draw a picture of a fish; on the other side, draw a picture of a bowl (decoration can be added).
4. Open the paper and place a straw in the middle of one side so it looks like a popsicle stick (not like a flag).
5. Fold the other side over and glue or staple the straw in place.
6. Hold the straw between the palms of your hand and move back and forth rapidly so that the straw spins. Keep your eyes on the fish and the bowl.

Discovery

What’s happening?
When the straw is rotated rapidly, the fish appears to be inside the bowl. Whenever we see an image, the brain holds onto that image for a short time (1/16 of a second). If another image appears within that time, we will see both images. This is called persistence of vision.


Why does it matter?
Movies and cartoons depend on this phenomenon. If approximately 24 slightly different pictures move in front of the eye each second, they will blend together to make a moving picture. Motion pictures consist of still pictures (frames) that move across a screen at 24 frames per second.


The use of animation techniques to create moving images predates conventional cinema. Devices like the phenakistoscope and the zoetrope used the basic principles of animation to provide entertainment in the 19th century.

































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