<unk> <unk> <unk> <unk> <unk>  Passage: It was the negative result of a famous experiment, that required the introduction of length contraction: the Michelson<unk>Morley experiment (and later also the Kennedy<unk>Thorndike experiment). Passage: It was the negative result of a famous experiment, that required the introduction of length contraction: the Michelson<unk>Morley experiment (and later also the Kennedy<unk>Thorndike experiment). ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️  Question: What is the definition according to special relativity?
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