How can the wave spectrum be divided?

The wave spectrum can indeed be divided into mechanical and electromagnetic types, which is the correct choice. This classification is based on the fundamental nature of the waves and the medium through which they propagate. Mechanical waves require a medium, such as air or water, to travel and include sound waves and seismic waves. Electromagnetic waves, on the other hand, do not require a medium and can travel through a vacuum; examples include radio waves, microwaves, and light waves.

This distinction is essential in fields such as physics, telecommunications, and many engineering applications, as it influences how different types of waves interact with materials and how they can be utilized in various technologies. Understanding this division allows for a better grasp of the properties and applications of different types of waves in practical scenarios.