It's acceleration that causes the departure from Euclidean geometry rather than speed. Centripetal acceleration in this case. Straight line motion doesn't do this
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This. Because once you see this, you only need the equivalence principle to see that departure from Euclidean geometry is the natural effect of gravity.
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Euclidian geometry is just a low-speed approximation of reality.
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等于√1-v²/c²。 假如两个时空座标系存在相对匀速圆周运动,那么这种几何学的类型,绝对不是那种惯性运动的“闵科夫斯基几何学”,即它绝对不是“爱因斯坦狭义相对论”。这是一种极为复杂的,各向异性的,非惯性,非线性的座标系。艰深复杂程度,可以同各向异性的,非惯性,非线性的“爱因斯坦狭义相对论”
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有一拼! 为何两个相对匀速直线运动的时空座标系,不论是两个相对相对匀速直线运动的欧氏椭圆时空座标系,还是两个相对相对匀速直线运动的非欧抛物时空座标系,还是两个相对相对匀速直线运动的非欧双曲时空座标系,它们一概都那种处处均匀,各向同性,线性的,惯性的,不受任何力作用的惯性座标系呢?
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That's just half of the story – the notion of a rigid body does not work in relativity.
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Lorentz-FitzGerald contraction comes with time dilation. Not only geometry changes but time slows down too. ∆t′=∆t/√(1-v²/c²)
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啊哈


~!这里,又给出了一个非常典型的伪科学的具体案例。为了帮助玻尔导师可以定性定量地诠释化学元素周期表,发现第四个量子数,即自旋量子数的玻尔的学生泡利同学,曾经在20世纪上叶是如何尖刻地讥讽这种伪科学的?他说:“连犯错误都算不上”。
我们为何说这是伪科学的一个典型案例呢?pic.twitter.com/XC9fkePz44
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当爱因斯坦的数学老师闵科夫斯基把“爱因斯坦狭义相对论”的数学几何模型,在1910年化为“闵科夫斯基几何学”这种非欧几何学的时候,这是有先决条件的,即只有在两个相对相对匀速直线运动的双曲时空座标系中,在一个闵科夫斯基双曲直角三角形中,一个直角边长等于1,另外一个直角边长等于v/c,斜边的边长pic.twitter.com/XQ7blJOT9l
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