Question

How fast do different parts of the EM spectrum travel in a vacuum?

Answer 1

At the speed of light.

Explanation:

Remember that the EM spectrum are comprised of energy waves. Light is an energy and is part of the EM spectrum.

Speed of light in a vacuum is `299 792 458 m/s`. Most people round to `3.0xx10^8`. However the speed alters when travelling in through a medium, like water or air.

Hope this helps :)

Answer 2

All parts of the EM spectrum travel at `3*10^8 m/s`.