Multiple choice

The phase velocity of an electromagnetic wave propagating in a hollow metallic rectangular waveguide in the TE10 mode is

  1. equal to its group velocity

  2. less than the velocity of light in free space

  3. equal to the velocity of light in free space

  4. greater than the velocity of light in free space

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

We know that vp > c > vg.