Here's why:
* Electromagnetic waves are disturbances in electric and magnetic fields. These fields are intertwined and constantly regenerating each other, propagating the wave forward.
* The speed of light is determined by the permittivity and permeability of the vacuum. These are fundamental constants that describe how electric and magnetic fields behave in a vacuum.
* The speed of light in a vacuum is a constant, regardless of the frequency or wavelength of the electromagnetic wave. This means that all electromagnetic waves, from radio waves to gamma rays, travel at the same speed in a vacuum.
The value of the speed of light in a vacuum is approximately:
* 299,792,458 meters per second (m/s)
It's important to note that the speed of light can change when it travels through a medium other than a vacuum. This is because the electric and magnetic fields interact with the medium, slowing down the wave.
