凸レンズは光を一点に集めることができる。それを利用して太陽の光で紙を焼く、光を使った治療などで使われています。 Template




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tomski凸レンズは光を一点に集めることができる。それを利用して太陽の光で紙を焼く、光を使った治療などで使われています。 coloring