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The electric and magnetic field of an electromagnetic wave are:

1. in opposite phase and perpendicular to each other
2. in opposite phase and parallel to each other
3. in phase and perpendicular to each other
4. in phase and parallel to each other

Correct answer: in phase and perpendicular to each other

Solution

In an electromagnetic wave, the electric and magnetic fields oscillate in phase and are perpendicular to each other as well as to the direction of wave propagation.

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