虹の色

太陽の光は赤いから紫までの可視光線の色がある。　たいてい白だけが見えても、　虹で色が全部みえる。　どうやって虹こそで見えるかの説明は反射と屈折だ。　虹の水で反射と屈折が相まって、　色が開けて一色一色見えるようになる。

Sunlight contains light on the visible spectrum all the way from red to violet. Even though usually only white can be seen, all the colours can be seen in a rainbow. The reason why the colours are visible specifically in rainbows is spelled reflection and refraction. In the water droplets of the rainbow, the combination of reflection and refraction causes the colours to spread out and become visible separately.