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Question 133

How are the component fields of an electromagnetic wave oriented?

  1. They are parallel
  2. They are tangential
  3. They are at right anglesCorrect answer
  4. They are 90 degrees out of phase

Explanation

The electric and magnetic fields of a plane wave are perpendicular to each other and to the direction of travel. “90 degrees out of phase” describes a relationship in time rather than an orientation in space, and in a plane wave travelling through a lossless medium the two fields are in fact in time phase, rising and falling together.

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Question 133: How are the component fields of an electromagnetic wave… · FCC Amateur Extra Class (Element 4) · Questena