44. The magnetic field of a plane-polarized electromagnetic wave moving in the z-direction is given by
in St units. What is the speed of the EM wave?
(A) 3 x 108m/s
(B) 100m/s
(C) 106m/s
(D) 2 x 107m/s
(E) 2x108m/s
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統計: A(17), B(0), C(0), D(0), E(0) #3081284
統計: A(17), B(0), C(0), D(0), E(0) #3081284