1秒って本当はどれくらい？地球の自転から原子時計まで時間の長さを解説
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YouTubeなみちゃん【なるほど知識】
1秒って本当はどれくらい？地球の自転から原子時計まで時間の長さを解説
「1秒ってどのくらいの長さ？」と聞かれると、つい「1分の60分の1でしょ？」と答えたくなりますよね。 でも実は、この質問は何百年ものあいだ科学者を悩ませ、原子時計という超精密な時計を生み出すきっかけにもなりました。 この動画では、地球の自転 ...
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