3 ms·

New technique generates topological structures with gravity water waves

spacemanspiff01 2y ago
For those who wondered what gravity had to do with this: https://en.m.wikipedia.org/wiki/Gravity_wave https://en.m.wikipedia.org/wiki/Gravity_wave
- lmpdev 2y ago
  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
  - waterthrowaway 2y ago
    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!
- zackmorris 2y ago
  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-rings-after-galactic-impact/ https://www.earth.com/news/bullseye-galaxy-reveals-stunning-...
westurner 2y ago
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 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.
hoseja 2y ago
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.
- thfuran 2y ago
  Isn't that how the standard model already works? Each elementary particle is an excitation of a corresponding field.
  - rfonseca 2y ago
    The book Waves in an Impossible Sea by Matt Strassler goes deep into explaining precisely this. https://profmattstrassler.com/waves-in-an-impossible-sea/ https://profmattstrassler.com/waves-in-an-impossible-sea/
- cwmoore 2y ago
  Interference patterns in waves centered on the masses of the solar system: https://www.ouruboroi.com/moire2 https://www.ouruboroi.com/moire2
pseudosaid 2y ago
that website is cancer on mobile. 10% content, 90% adverts

For those who wondered what gravity had to do with this: https://en.m.wikipedia.org/wiki/Gravity_wave https://en.m.wikipedia.org/wiki/Gravity_wave

lmpdev 2y ago
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
- waterthrowaway 2y ago
  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!
zackmorris 2y ago
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-rings-after-galactic-impact/ https://www.earth.com/news/bullseye-galaxy-reveals-stunning-...

westurner 2y ago

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 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.

hoseja 2y ago

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.

thfuran 2y ago
Isn't that how the standard model already works? Each elementary particle is an excitation of a corresponding field.
- rfonseca 2y ago
  The book Waves in an Impossible Sea by Matt Strassler goes deep into explaining precisely this. https://profmattstrassler.com/waves-in-an-impossible-sea/ https://profmattstrassler.com/waves-in-an-impossible-sea/
cwmoore 2y ago
Interference patterns in waves centered on the masses of the solar system: https://www.ouruboroi.com/moire2 https://www.ouruboroi.com/moire2

pseudosaid 2y ago

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