词条 光子
描述: 光子(photon)一词来自希腊语 phōs,释义为光,与light同义并可互换使用。当天文学家提到光时,他们指的是从无线电波一直到伽马射线所有类型的电磁辐射。
光子是一种基本粒子,是电磁力的载体,被认为是最小的电磁能量波包(量子)。给定频率的子的能量与其频率成正比,与其波长成反比。
现代观点认为,光子不仅是一种粒子,也是一种波。在天文学中,光子是我们观测和测量宇宙及其所含天体各个方面的基础。
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