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Coin on the bottle. The Secret of Focus

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

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Focus Description:

The coin moves along the bottle.

Focus secret:

To demonstrate this trick, you will need a light coin and an empty plastic bottle.

Without the audience noticing, wet the neck of the bottle with water. Place the coin on the moistened neck of the bottle. Grasp the bottle with both hands. After some time, the coin will begin to move.

This trick is based on one of the basic laws of physics. The warmth of your hands warms the air inside the bottle, which expands and causes the coin to move as the expanded air seeks a way to escape.

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