理科ネタ【光の速さを求める実験】 https://chuugakurika.com/2022/07/08/%e7%90%86%e7%a7%91%e3%83%8d%e3%82%bf%e3%80%90%e5%85%89%e3%81%ae%e9%80%9f%e3%81%95%e3%82%92%e6%b1%82%e3%82%81%e3%82%8b%e5%ae%9f%e9%a8%93%e3%80%91/