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Glossary term: 電離層

Description: 電離層是大氣層的一部分(約 80 公里以上)。它含有高濃度的離子,這是由於地球從太陽接收到的高能輻射將分子分解成原子,再將原子分解成離子和電子。自由電子的存在使大氣層的這一區域成為良好的導電體。因此,電離層能夠反射某些波長的無線電波。

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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
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