Question

All parts of the electromagnetic spectrum travel at a speed of 3 × 108 m/s when traveling through no medium. A "vacuum" means that there is no medium, such as a tube without any air in it. Therefore, 3 × 108 m/s is said to be the speed of light in a vacuum.

Answer 1

wrong, the speed of light is approximately 299 792 458 meters/second in a vacuum, not 324 meters/second in a vacuum