Here's why:
* Electromagnetic waves are fundamentally the same: They consist of oscillating electric and magnetic fields propagating through space.
* Speed determined by constants: The speed of light in a vacuum (approximately 299,792,458 meters per second) is determined by the permittivity and permeability of free space, which are fundamental constants of nature. These constants are the same for all electromagnetic waves, regardless of their frequency or wavelength.
Important note: While all electromagnetic waves travel at the speed of light in a vacuum, their speed can change when they travel through different mediums (like air, water, or glass). This change in speed is what causes phenomena like refraction (bending of light).
