Description:
A domino can knock over another domino about 1.5x larger than itself. A chain of dominos of increasing size makes a kind of mechanical chain reaction that starts with a tiny push and knocks down an impressively large domino.
Original idea by Lorne Whitehead, American Journal of Physics, Vol. 51, page 182 (1983).
See
http://arxiv.org/abs/physics/0401018 and
http://arxiv.org/abs/1301.0615
for sophisticated discussions of the physics.
This video is the root of a zillion memes via
https://imgflip.com/memegenerator/162372564/Domino-Effect
As seen on QI in the "kinetic" episode. I was contacted by those Elves.
http://youtu.be/9jzlUEpXK48?t=39m30s
A typo in the credits has been blurred out.
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