The Arrow of Time feat. Sean Carroll
Why is the past different from the future? Caltech physicist Sean Carroll explains how the arrow of time is not an intrinsic property of physics, but rather an emergent feature. Trying out...
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It's perfectly obvious the time has a directionAll we mean by that is that the past is different from the future in lots of different waysWe were younger in the past, we will be older in the futureWe remember the past, we don't remember the futureThe surprise is that that difference between past and futureis nowhere to be found in the deep down laws of physicsTime is actually a lot like space if you're out in a space suit flying aroundthere will be no difference between up, down, left, rightlikewise, there is no intrinsic difference between the past and the futurein the laws of physics. Now that's not completely a mystery to uswe know that what actually happens in the real worldis that you're not just made of one or two particles...
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It's perfectly obvious the time has a directionAll we mean by that is that the past is different from the future in lots of different waysWe were younger in the past, we will be older in the futureWe remember the past, we don't remember the futureThe surprise is that that difference between past and futureis nowhere to be found in the deep down laws of physicsTime is actually a lot like space if you're out in a space suit flying aroundthere will be no difference between up, down, left, rightlikewise, there is no intrinsic difference between the past and the futurein the laws of physics. Now that's not completely a mystery to uswe know that what actually happens in the real worldis that you're not just made of one or two particles...
