問題詳情

49. Electromagnetic wave is travelling in the free space with the amplitudes of theelectric and magnetic fields as Emax and Bmax, respectively. What is the averageenergy density in the space? 
(A)


(B)


(C)


(D)


(E)

參考答案

答案：E
難度：計算中-1
書單：沒有書單，新增