Antigravity Fluid Tube - Glass Sealed Xenon Supercritical Fluid

What's this

Inside the glass tube is a curious “antigravity” scene: the fluid on top is a liquid, while the “gas” below seems to hold it up. What you’re seeing isn’t magic—it’s a special state of matter.

• The key player is xenon in its supercritical state, often called the fourth state of matter. A supercritical fluid looks like a gas, but it can have a liquid-like density.
• In this tube, we seal two components together: xenon and a dyed alcohol.
• Under the right temperature and pressure, xenon becomes supercritical. It appears gaseous, yet its density reaches about 1.1 g/cm³.
• That density is actually higher than the alcohol’s. As a result, the liquid alcohol floats on top of the “gaseous” supercritical xenon.
• This inversion of the usual order—liquid above, “gas” below—creates the striking antigravity effect.

In short: supercritical xenon behaves like a gas to the eye, but it’s dense enough to support a lighter liquid above it.

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