Why Your Clock Doesn't Measure Time | Leonard Susskind скачать в хорошем качестве

Why Your Clock Doesn't Measure Time | Leonard Susskind

What is time, actually? Not what it does. Not how we measure it. What it is at the deepest level of physical reality. Most people never question it. Time is the number on the clock. The thing that moves from past to future. Obvious. Unquestioned. But fifty years of theoretical physics has completely dismantled that simplicity. In this video, I want to take apart time layer by layer. We'll start with special relativity and why Newton's absolute time was wrong from the beginning. Then the block universe, where past and future exist as permanently as the present. Then the arrow of time, which turns out to be a statistical accident of cosmological history, not a fundamental law. Then the Wheeler-DeWitt equation — the most fundamental equation we have for the universe — which contains no time variable at all. And finally, what that silence means: time is emergent. It arises from quantum entanglement. It is not fundamental. I'm Leonard Susskind. And what time actually is will change how you think about every moment you've ever lived.