Maybe the laws of physics have remained constant (but maybe not?), but at the vary least God’s way of relating to the world and his people (which we sometimes call a “covenant”) changes as we move from one age to the next. So the two ages are different, and that difference is a sign to the scoffers and to the church that God is at work and will bring about his purposes and promises.
Revelation seems so difficult and confusing, but John has actually given us firm footholds in the opening of his letter. He’s guiding his readers in how Revelation is to be read.