Answer:
Both visible light and radio waves travel at the same speed in a vacuum: the speed of light, approximately 299,792 kilometers per second (186,282 miles per second).
Step-by-step explanation:
In a vacuum, electromagnetic waves, including visible light and radio waves, travel at a constant speed known as the speed of light. This speed is about 299,792 kilometers per second or 186,282 miles per second. The wavelength or frequency does not affect this speed; they all move at the same rate.