* Electromagnetic waves are composed of oscillating electric and magnetic fields. These fields regenerate each other, propagating energy through space.
* The speed of light in a vacuum is a fundamental constant of nature. It's denoted by 'c' and is approximately 299,792,458 meters per second.
* Maxwell's equations, which describe the behavior of electromagnetic fields, predict that the speed of electromagnetic waves is equal to 'c'.
Therefore, all electromagnetic waves, including radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays, travel at the speed of light in a vacuum.
Important Note: The speed of light can be slower in mediums other than a vacuum, like water or glass. This is because the electric and magnetic fields interact with the medium's particles, slowing down the wave's propagation.
