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If E̅ and B̅ represent electric and magnetic field vectors of the electromagnetic waves, then the direction of propagation of the waves will be along:

1. E̅ × B̅
2. B̅ × E̅
3. B̅
4. E̅ × B̅

Correct answer: E̅ × B̅

Solution

The direction of propagation of an electromagnetic wave is given by the cross product of the electric field vector (E̅) and the magnetic field vector (B̅), which is E̅ × B̅.

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