Physics
WAEC 2020
Which of the following waves requires a material medium for its propagation?
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A.
Radio waves
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B.
Light waves
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C.
Sound waves
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D.
X-rays
Correct Answer: Option C
Explanation
- Electromagnetic waves are waves that have no medium to travel whereas mechanical waves need a medium for its transmission.
- sound wave is an example of a mechanical wave. Sound waves are incapable of traveling through a vacuum.
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