Watch Supersonic Shock Waves Launch from a Bottle of Champagne.

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Scientists used a high-speed  camera to record the moment the cork pops.

A Mach disk forms during the uncorking of a bottle of champagne.(Image: © Equipe Effervescence/ CNRS/ Université de Reims)
▼ Popping open a bottle of bubbly creates shock waves like those in the supersonic exhaust of a fighter jet, according to a new study.
The split-second pop of a champagne cork is created by a quick escape of high-pressure gas long stuck in the bottle's neck. Now, a group of researchers has used high-speed photography to visualize the chemistry behind that iconic pop.
For the experiment, they acquired six champagne rosé bottles, two of which they stored at 30 degrees Celsius (86 degrees Fahrenheit) and two at 20 C (68 F) for three days. These bottles had been previously aged for 42 months, undergoing what's called "prise de mousse," a type of alcohol fermentation. During this process, yeast feeds on sugar to create carbon dioxide, giving champagne its fizz
The researchers then used a high-speed camera to record the moment the corks popped. The high-speed camera was attached to a microphone that recorded the bang and triggered the camera to snap a series of photos.
Here's what the scientists saw: When the cork popped out of the bottle, it was violently shoved by rapidly expanding carbon dioxide and water vapor that had long been confined in the neck of the bottle. This sudden change in pressure caused the carbon dioxide and water vapor to cool down into ice crystals and condense into a fog that wafted out with the cork.
But to their surprise, the researchers found that (▪ ▪ ▪)

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