为了检验这个假说，牛顿把一束阳光通过一个玻璃三棱镜投射到墙上，发现他分解为一个光谱。

To test this hypothesis, Newton shined a beam of sunlight through a glass prism and showed that it decomposed into a spectrum cast on the wall.

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望远镜两端的曲面玻璃镜头起到了三棱镜的作用。

The curved glass lenses at each end of the telescope acted like prisms.

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