Multiple Choice
The electromagnetic wave of the radiation field from a wire antenna travels toward the plane of your paper (which is in the -z direction) . At time t = 0 s, the wave strikes your paper at normal incidence. The magnetic field vector at point O in the figure points in the -y direction and has a magnitude of 4.0 × 10-8 T. The frequency of the wave is 1.0 × 1016 Hz. 
-What is the direction of the electric field?
A) It points in the negative y direction.
B) It points in the positive y direction.
C) It points in the negative z direction.
D) It points in the negative x direction.
E) It points in the positive x direction.
Correct Answer:
Verified
Correct Answer:
Verified
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