問題詳情

13. In vacuum, an electromagnetic wave traveling along the x axis has an electric field

and a magneticfield

whose magnitudes depend on x and t as
E(x,t)=E0sin(kx一ωt),B(x,t)=B0sin(kx-ωt+Φ),
where E0 and B0 are the amplitudes of

. Which fact below is correct?
(A)


(B)The directions of 

 and 

  are arbitrary once they are perpendicular to x.
(C)Φ=π/2
(D) ωk =c
(E)This is a linearly polarized wave.

參考答案

答案：E
難度：計算中-1
書單：沒有書單，新增