alleryIn an electromagnetic wave, E and B are:
AAnti parallel
BCoincident
CStationary
DPerpendicular
Answer & Solution
Correct answer: D. Perpendicular
1. The two fields oscillate together as the wave travels.
2. Neither lies along the direction of travel.
3. E and B are perpendicular to each other and to that direction.
4. So the answer is perpendicular.
_Source: syllabus Physics, Ch 8 'Electromagnetic Waves'_
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