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Items tagged with: physics
English self-taught mathematician and physicist Oliver Heaviside was born #OTD in 1850.
He invented a new technique for solving differential equations, independently developed vector calculus, and rewrote Maxwell's equations in the form commonly used today. He significantly shaped the way Maxwell's equations are understood and applied in the decades following Maxwell's death. His practical experience in telegraphy provided a foundation for his later theoretical work.
A mind-blower for a Friday evening:
This deceptively simple-looking graph is a spectrum of *gravitational waves* ringing through the Milky Way.
The waves may be caused by a chorus of supermassive black holes colliding all across the universe. Whoa!
https://arxiv.org/abs/2306.16227 #science #space #physics #astronomy
The second data release from the European Pulsar Timing Array: IV. Implications for massive black holes, dark matter and the early Universe
The European Pulsar Timing Array (EPTA) and Indian Pulsar Timing Array (InPTA) collaborations have measured a low-frequency common signal in the combination of their second and first data releases respectively, with the correlation properties of a gr…arXiv.org
I can't tell if this sounds like a good theory because it is, or if it's just because it sounds so much like a sci-fi movie.
There's a hidden dimension 1 micron to the left of reality, and gravitons are just ghosts leaking out from there into our world.
In a ‘Dark Dimension,’ Physicists Search for Missing Matter | @QuantaMagazine
https://www.quantamagazine.org/in-a-dark-dimension-physicists-search-for-missing-matter-20240201/
#physics #StringTheory #darkmatterdarkenergy
In a ‘Dark Dimension,’ Physicists Search for Missing Matter | Quanta Magazine
An idea derived from string theory suggests that dark matter is hiding in a (relatively) large extra dimension. The theory makes testable predictions that physicists are investigating now.Quanta Magazine
The universe may have a complex geometry — like a doughnut.
Science News reports: "In a universe with an analogous, complex topology, you could travel across the cosmos and end up back where you started."
#Space #Universe #Physics #Astrophysics #Science
The universe may have a complex geometry — like a doughnut
Physicists haven’t yet ruled out the possibility that the universe has a complicated topology in which space loops back around on itself.Emily Conover (Science News Magazine)
Lenin and the Art of the Impossible - Vox Popoli
The Tree of Woe contemplates the impossibility of revolution: Every rock star began as a long-haired freak in a garage with a dream of a record deal and groupies. Every best-selling author began as a would-be writer being told that no one buys books.VD (Vox Popoli)
American physicist Richard Feynman was born #OTD in 1918.
He developed the Feynman diagrams, a pictorial representation of the mathematical expressions governing the behavior of subatomic particles, which provided a powerful tool for calculating complex interactions among particles. He received the Nobel Prize in Physics in 1965 jointly with Julian Schwinger and Shin'ichirō Tomonaga for their fundamental contributions to the development of quantum electrodynamics (QED).
Well, this seems to be an interesting and unexpected big deal: a new paper suggests that light can evaporate water without actually needing to heat the water up first. And it could sort out a few problems in existing cloud physics:
https://news.mit.edu/2024/how-light-can-vaporize-water-without-heat-0423
How light can vaporize water without the need for heat
MIT researchers discovered that light can cause evaporation of water from a surface without the need for heat. This “photomolecular effect” could be important for understanding climate change and for improving some industrial processes.MIT News | Massachusetts Institute of Technology
