What is the vehicle through which the waves travel from one point to the next?

What is the vehicle through which the waves travel from one point to the next?

• A. Medium
• B. Space
• C. Vacuum
• D. Field

Answer: (A)

The key idea is that many waves rely on a physical medium to carry the disturbance from one location to another. A medium is the substance that actually vibrates or rearranges as the wave passes, transmitting energy through successive interactions between its particles. For example, sound travels through air by compressions and rarefactions that push neighboring air molecules, and water waves move energy across the surface as water particles move up and down and interact with neighbors. In a vacuum there are no particles to carry such a disturbance, so mechanical waves cannot propagate there; electromagnetic waves can travel through a vacuum, but that involves disturbances in a field rather than a material medium. So the vehicle through which the wave travels in the typical, mechanical-waves context is the medium.

The key idea is that many waves rely on a physical medium to carry the disturbance from one location to another. A medium is the substance that actually vibrates or rearranges as the wave passes, transmitting energy through successive interactions between its particles. For example, sound travels through air by compressions and rarefactions that push neighboring air molecules, and water waves move energy across the surface as water particles move up and down and interact with neighbors. In a vacuum there are no particles to carry such a disturbance, so mechanical waves cannot propagate there; electromagnetic waves can travel through a vacuum, but that involves disturbances in a field rather than a material medium. So the vehicle through which the wave travels in the typical, mechanical-waves context is the medium.