WAEC Physics 2020 Objective — Question 8
Question 8 of 50 from the West African Examinations Council (WAEC) Physics 2020 Objective paper, with the correct answer and a full explanation.
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Which of the following waves requires a material medium for its propagation?
- A. Radio waves
- B. Light waves
- C. Sound wavesCorrect
- D. X-rays
Explanation
Radio waves, light waves, X-rays are all electromagnetic waves which do not require a material medium for propagation. However, sound wave as a mechanical wave requires a material medium for its propagation.
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