how long does it take for light to travel across the diameter of _英语解答

how long does it take for light to travel across the diameter of earth's orbit around the sun?
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人气：348 ℃　时间：2020-02-06 04:19:00

解答

大约1秒钟时间.地球公转轨道直径约为3.0*10^8km 真空光速约3.0*10^8km/h 所以光穿过轨道直径需要大约一秒钟时间