Glossary term: 折射
Description: 折射是波（具体来说是光）从一种介质传播到另一种介质时改变方向的方式。这种变化的幅度和方向取决于两种介质的"折射率"，而"折射率"又取决于光在每种介质中的速度，这种关系用数学形式表示为斯涅耳折射定律。光线进入玻璃的方式可以用来制造透镜，透镜将平行光线（例如遥远恒星的光）聚焦，这就是折射望远镜成像的主要原理。折射还取决于入射光的波长，所以可以像三棱镜一样用来将光线按波长分成不同的基本颜色，这对于记录和研究光谱非常重要。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
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