Length Contraction and Time Dilation | Special Relativity Ch. 5
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In our universe, when you change from a non-moving perspective to a moving one, or vice versa, that change of perspective is represented by a what's called Lorentz transformation, which is a kind of squeeze-stretch rotation of spacetime that I've mechanically implemented with this spacetime globe. Two of the most famous implications of Lorentz transformations are phenomena called “length contraction” and “time dilation” – and while their names make them sound like they're two sides of the same coin, they're definitely not. We'll start with time dilation, which is easier to see – suppose I have a clock with me that ticks every two seconds. But if you're moving at a third the speed of light to my left, then from your perspective, the time coordinates at...
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In our universe, when you change from a non-moving perspective to a moving one, or vice versa, that change of perspective is represented by a what's called Lorentz transformation, which is a kind of squeeze-stretch rotation of spacetime that I've mechanically implemented with this spacetime globe. Two of the most famous implications of Lorentz transformations are phenomena called “length contraction” and “time dilation” – and while their names make them sound like they're two sides of the same coin, they're definitely not. We'll start with time dilation, which is easier to see – suppose I have a clock with me that ticks every two seconds. But if you're moving at a third the speed of light to my left, then from your perspective, the time coordinates at...
