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Question
At a certain point and a certain time the electric field of an electromagnetic wave is in the negative zdirection and the magnetic field is in the positive ydirection. Which of the following statements is true?A) Energy is being transported in the positive xdirection but half a cycle later, when the electric field is in the opposite direction, it will be transported in the negative xdirection.
B) Energy is being transported in the positive xdirection and half a cycle later, when the electric field is in the opposite direction, it will still be transported in the positive xdirection.
C) Energy is being transported in the negative xdirection but half a cycle later, when the electric field is in the opposite direction, it will be transported in the positive xdirection.
D) Energy is being transported in the negative xdirection and half a cycle later, when the electric field is in the opposite direction, it will still be transported in the negative xdirection.
E) None of the above is true.
Answer
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