I often hear that on the microscopic level, time-reversal symmetry is true for all physical processes. However, I can easily come up with counterexamples that seem to disprove this:
- Two particles of opposite charge being attracted by each other and accelerating towards one other as a result.
Furthermore, even barely observed on a microscopic level, the gravitational force surely defies time-reversal symmetry. A movie of an apple accelerating away from the ground is immediately recognizable as the reversed version of the true process. This is a macroscopic example, but you get the point.
So where am I wrong?