# @stem_antics on Instagram

- **Type:** Video
- **Original URL:** https://www.instagram.com/p/DVuGrbskt11
- **Gondola URL:** https://gondola.cc/posts/61935812-stem-antics-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/c5033f5807.jpg
- **Posted:** 2026-03-10T22:19:53.000+00:00
- **Account Owner:** Stem Antics (@stem_antics) — https://gondola.cc/stem_antics

## Caption

A plasma tube is usually filled with a low-pressure noble gas such as neon, argon, or a gas mixture. Electrodes at the ends of the tube apply a high voltage across the gas. Under normal conditions, gases are electrical insulators, but when the voltage becomes high enough, electrons are pulled away from atoms in the gas. This process is called ionization.

Once ionization begins, the gas becomes a plasma: a mixture of free electrons, positively charged ions, and neutral atoms. Because these particles carry charge, the plasma can conduct electricity. The electric field inside the tube accelerates the free electrons, causing them to collide with other atoms in the gas.

These collisions do two important things:
	1.	They knock additional electrons free, sustaining the plasma.
	2.	They excite atoms, pushing their electrons into higher energy states.

When those excited electrons fall back down to lower energy levels, they release energy in the form of photons—packets of light. The specific color of that light depends on the energy levels of the gas atoms involved.

For example:
	•	Neon produces the familiar red-orange glow.
	•	Argon tends to produce violet or lavender light.
	•	Helium produces a pinkish glow.
	•	Different gas mixtures can create blues, greens, and other colors.

The branching “root” patterns you see are plasma streamers. These form because the electric field is not perfectly uniform inside the tube. Ionization starts in localized regions, and the plasma channels grow outward in filament-like paths where electrons can move most easily. Each glowing branch is a pathway where electrons are rapidly accelerating and colliding with atoms, continuously producing light.

The reason the plasma appears to flicker and move is that these conductive pathways are constantly forming, collapsing, and reforming as the electric field redistributes charges in the gas.

In short: the glowing “roots” are not solid structures. They’re dynamic paths of ionized gas where electrons are racing through atoms and turning electrical energy into visible light.

#stemantics #physics #plasma #plasmaarc #electricit

## Stats

- **Views:** 2,412
- **Likes:** 115
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- **Comments:** 1

## Tags

plasmaarc, physics, electricit, stemantics, plasma

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