aikakäänteisyys
Aikakäänteisyys, often translated as time reversal or time symmetry, is a concept in physics referring to the hypothetical possibility that the laws of physics would be the same if time were running backward. Many fundamental laws, such as Newton's laws of motion and Maxwell's equations, are invariant under time reversal, meaning they describe the same physical processes whether time is moving forward or backward.
However, this symmetry is not observed in macroscopic phenomena. The most prominent example of this is the
The distinction between microscopic time symmetry and macroscopic irreversibility is a significant topic in physics. While