\- Give an example of a wave that does not need a medium in which to travel and a wave that does need a medium.

Question: Provide an example of a wave that does not require a medium to travel, and one that does. Explain the difference between these types of waves. Answer: An example of a wave that does not require a medium to travel is a light wave, which is an electromagnetic wave. Light can travel through the vacuum of space because it consists of oscillating electric and magnetic fields that propagate through space. A sound wave, on the other hand, is an example of a mechanical wave that requires a medium, such as air, water, or a solid, to travel. Sound waves are created by vibrations in a material medium and require the medium's particles to transmit energy from one point to another. The main difference is that electromagnetic waves can travel through a vacuum, while mechanical waves need a material medium to propagate.