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that you are able to reconcile this.
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Because in Newtonian days,
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simultaneity is absolute; length is absolute.
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In relativity, simultaneity is relative
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and length is also relative
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because the operational way to find the length of a body
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will not satisfy all observers.
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If I find the length of your moving meter stick,
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the two ends at the same time,
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you will say I didn't measure them at the same time and
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the formulas relative will allow that.
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That's how we live with the fact that