Question

In vaccum, electromagnetic waves travel at the speed of ____________

Answer 1

All waves of electromagnetic radiation travel at the speed of 3 x 108 m/s (in a vacuum). 

Answer 2

Answer:

Generally speaking, we say that light travels in waves, and all electromagnetic radiation travels at the same speed which is about 3.0 * 108 meters per second through a vacuum. We call this the "speed of light"; nothing can move faster than the speed of light.