The domino effect is a simple chain reaction that occurs when a small change causes a similar change nearby, which then will cause another similar change, and so on in linear sequence. The term is used as an analogy to a falling row of dominoes, and typically refers to a linked sequence of events. It can be used literally (an observed series of actual collisions) or metaphorically (complex systems such as global finance, where linkage is only a hypothesis).
Demonstrations of the effect
- The classic demonstration involves setting up a chain of dominoes stood on end, and toppling the first domino. That domino topples the one next to it, and so on. In theory, however long the chain the dominoes will still fall. This is because the energy required to topple each domino is less than the energy transferred by each impact, so the chain is self-sustaining. Energy is stored by setting each domino in the metastable upright position, and that energy is what keeps the chain toppling.
- There are many demonstrations of the effect involving more complex systems. Currently popular is the Diet Coke and Mentos film on YouTube, where a chain of Diet Coke and Mentos eruptions is demonstrated. Although apparently complex and lacking the purity of a simple chain, this involves a simple physical linkage whereby each eruption triggers the next.
See also
Relevant physical theory:
Domino effect in fiction:
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