Yes, in a vacuum, all forms of electromagnetic radiation, including light, travel at the same speed, which is approximately 299,792,458 meters per second (denoted as "c"). This speed is considered a fundamental constant in physics.
According to the theory of special relativity, proposed by Albert Einstein, the speed of light in a vacuum is the maximum speed at which information or signals can propagate. This speed is the same for all colors of light and all electromagnetic waves, regardless of their frequency or wavelength.
It's important to note that when light passes through a medium other than a vacuum, such as air, water, or glass, its speed can be slower due to interactions with the atoms or molecules in the medium. This results in a phenomenon called "refraction." The speed of light in a medium is typically less than the speed of light in a vacuum, but it still depends on the properties of the specific medium.
In summary, in a vacuum, all forms of electromagnetic radiation, including light, travel at the same speed, which is approximately 299,792,458 meters per second. This speed is constant and does not depend on the color of light or the frequency of the electromagnetic wave.