Which waves does not belong to the category of the other three
Which one of the following waves does not belong to the category of the other three?
- X-rays
- Microwaves
- Radio waves
- Sound waves
Answer
Sound waves do not belong in the electromagnetic spectrum. The full electromagnetic spectrum contains all of the various wavelengths and frequencies of electromagnetic radiation.
The Sound wave is a mechanical wave. It requires a medium to travel while electromagnetic waves can travel in a vacuum.
The correct option is D.