Question Pool -- Category E8E
Which of the following best describes electromagnetic waves traveling
in free space?
-
A.
- Electric and magnetic fields become aligned as they travel
-
B.
- The energy propagates through a medium with a high refractive
index
-
C.
- The waves are reflected by the ionosphere and return to their
source
-
D.
- Changing electric and magnetic fields propagate the energy across
a vacuum
See answer.
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