問題詳情
21. 下列有關「電磁波」的敘述，何者正確？
(A)電磁波必須倚靠介質方可傳播
(B)紫外線是一種電磁波
(C)自然界中電磁波的速度必小於光速
(D)赫茲是第一個計算出電磁波速度的科學家
(E)電磁波的存在驗證了電與磁之間的緊密關係。
(A)電磁波必須倚靠介質方可傳播
(B)紫外線是一種電磁波
(C)自然界中電磁波的速度必小於光速
(D)赫茲是第一個計算出電磁波速度的科學家
(E)電磁波的存在驗證了電與磁之間的緊密關係。
參考答案
答案：B,E
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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