Answer :
The speed the electromagnetic waves travel is up to 10 x 3^8 s/m through the process of less than c. Hope this helps
The speed of light in the vacuum has an exact value of 299 792 458 -meters per second given by the federal bureau of units so before deleting answers mods, go check what people say! It has been set to a whole number because the meter had been defined to be the distance travelled by light in 1/299792458 seconds
