WAEC - Physics (2020 - No. 8)
Which of the following waves requires a material medium for its propagation?
Radio waves
Light waves
Sound waves
X-rays
ব্যাখ্যা
- 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.