In a vacuum, both radio waves and light waves travel at the same speed, which is the speed of light, approximately 299,792 kilometers per second (or about 186,282 miles per second). This means that neither travels faster than the other; they are both forms of electromagnetic radiation.
The reason for this is that radio waves and light waves are part of the electromagnetic spectrum, and they share the same fundamental properties in a vacuum. When we refer to ‘light,’ we often think of visible light, but in scientific terms, ‘light’ encompasses all electromagnetic waves, including radio waves, microwaves, infrared, ultraviolet, X-rays, and gamma rays.
What’s interesting is how we perceive or utilize these waves. We use radio waves for communication, while visible light plays a crucial role in our everyday experiences. However, in terms of fundamental physics, they do not differ in their speed when moving through a vacuum. Their speeds can differ when passing through different mediums, like air or glass, but in the vacuum of space, they are identical.