Exam-style question
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How do electromagnetic waves differ from mechanical waves?.
- A.Electromagnetic waves can travel through a vacuum.
- B.Mechanical waves can travel through a vacuum.
- C.Electromagnetic waves have a lower speed than mechanical waves.
- D.Mechanical waves do not involve oscillating fields.
Model answer
What a good answer should say
- Electromagnetic waves can travel through a vacuum.
Explanation
Why this works
Unlike mechanical waves, which require a medium (like air or water) to propagate, electromagnetic waves can travel through a vacuum, making them unique in their ability to transmit energy through empty space.
Common mistake
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