Yes, in a vacuum, all kinds of electromagnetic radiation, including light, travel at the same speed, which is approximately 299,792,458 meters per second (or about 186,282 miles per second). This speed is commonly denoted as the speed of light, symbolized by the letter 'c'.
According to the theory of special relativity proposed by Albert Einstein, the speed of light in a vacuum is constant and represents the maximum speed at which information or signals can travel in the universe. This means that whether it's visible light, radio waves, microwaves, X-rays, or any other form of electromagnetic radiation, they all propagate at this universal speed limit.
However, it's worth noting that the speed of light can be affected when passing through different materials, such as air, water, or glass. When light travels through a medium, it can be slowed down due to interactions with atoms or molecules in that material. The extent to which light is slowed down is characterized by the refractive index of the material. In such cases, different types of light may travel at different speeds depending on their wavelength or frequency.