New technique generates topological structures with gravity water waves | Hacker News Reader

New technique generates topological structures with gravity water waves

phys.org

57 pointsbryanrasmussen10 comments

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For those who wondered what gravity had to do with this:

https://en.m.wikipedia.org/wiki/Gravity_wave

After reading, it turns out gravity waves are just 99%+ of regular waves on the ocean

I’m utterly befuddled by that term

Feels a bit like another LoRa vs LoRA situation, but in reverse this time

In the field of Geophysical Fluid Dynamics it is an important distinction as there are other very important waves. Rossby waves are not gravity waves and extremely important to the global climate (see their role in ENSO dynamics). Compressive waves (acoustic waves) are everywhere of course. There are also topographic Rossby waves, internal waves and Kelvin waves (note: kelvin waves and internal waves are gravity waves as well). Oh, and inertial waves!

Hubble just spotted a "bullseye" galaxy where a smaller galaxy passed through the center and caused ripples in the gas bobbing with gravity, like dropping a stone in a pond:

https://www.earth.com/news/bullseye-galaxy-reveals-stunning-...

This, in three(plus one) dimensions and with some devilish complication, is what I imagine quantum relativity (theory of everything) will turn out to be — elementary particles as topological structures made of spacetime. String theory seems to have gone astray in the name of feasible computability/somewhat comprehensible mathematical structure.

Isn't that how the standard model already works? Each elementary particle is an excitation of a corresponding field.

The book Waves in an Impossible Sea by Matt Strassler goes deep into explaining precisely this. https://profmattstrassler.com/waves-in-an-impossible-sea/

Interference patterns in waves centered on the masses of the solar system:

https://www.ouruboroi.com/moire2

Water also focuses laser plasmas;

"Innovative target design leads to surprising discovery in laser-plasma acceleration" https://phys.org/news/2025-02-discovery-laser-plasma.html

> Compared to similar experiments with solid targets, the water sheet reduced the proton beam's divergence by an order of magnitude and increased the beam's efficiency by a factor of 100.

that website is cancer on mobile. 10% content, 90% adverts

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