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Abstract
I 1676 opdagede Rømer, at lys har en endelig hastighed, og i 1865 bestemte Maxwell den til 299.792.458 m/s i vakuum. Her, 350 år efter Rømers opdagelse, har forskere testet, at lysets hastighed stadig er konstant med hidtil uset præcision ved hjælp af gammastråler fra fjerne kosmiske kilder.
References
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