i => -i under T. If you want to read even more, time reversal is an antiunitary transformation. (That's the magic phrase to anchor your searches) Physics is bu

i => -i under T. If you want to read even more, time reversal is an antiunitary transformation. (That's the magic phrase to anchor your searches) Physics is built on symmetries. They're how we can multiply the predictive power of simple theories. Time-reversal is fun and important, but it isn't actually about reversing time. It's about understanding the symmetry governing the interactions that define our existence.