Back in 2004, I was asked “what’s the 4th state of matter?” – something taught in physics at school – to which I had no answer. Turns out it’s “Plasma” and that it may be the most common state of matter in the universe. But if there is a 4th state of matter, there may be a 5th phase, too – and – who knows what else? A little over a year ago, a friend sent me this
The simplest explanation for ultra-high-energy cosmic rays: https://bigthink.com/starts-with-a-bang/simplest-explanation-ultra-high-energy-cosmic-rays/
Scientists trap light inside a magnet: https://phys-org.cdn.ampproject.org/c/s/phys.org/news/2023-08-scientists-magnet.amp
Light trapped inside a magnetic crystal can strongly enhance its magneto-optical interactions. Strong optical responses of magnets are important for the development of magnetic lasers and magneto-optical memory devices, as well as for emerging quantum transduction applications.