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範例:電磁波的傳遞[103學測]

在雷雨天收聽廣播節目時,一道強烈閃電畫破天際,收音機隨之發出一陣雜訊,說明劇烈放電可產生電磁波。下列關於電磁波性質的敘述,哪些正確?(應選2項)
(A)電磁波不需要介質即可傳播
(B)電磁波的電場振盪方向與傳播方向相互垂直
(C)電磁波的磁場振盪方向與傳播方向相互平行
(D)電磁波的介質振動方向與傳播方向相互垂直
(E)電磁波的介質振動方向與傳播方向相互平行 

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Posted in 光與電磁波, 歷屆學測(推甄)考題.

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