Logging in (or registering) will help the system to select questions that you need to focus on.

E8D09

Which of the following best describes electromagnetic waves traveling in free space?

Select	Answer
A	Electric and magnetic fields become aligned as they travel
B	The energy propagates through a medium with a high refractive index
C	The waves are reflected by the ionosphere and return to their source
D	Changing electric and magnetic fields propagate the energy across a vacuum

---

Hamboozler: Copyright 2007 Four Batons Technology. All rights reserved.
By continuing to use this site, you are agreeing to the Privacy Policy and Terms of Service.
Contact Us