# electromagnetic field propagation distance for a given electric field

#### skyline977

Joined Jan 14, 2021
29
Hi all,
The question is:

However, below is my attempt:

Source:
FE electrical and computer practice exam,
by NCEES
ISBN 978-1-947801-00-4

#### Tesla23

Joined May 10, 2009
524
E decays according to $$e^{-Re(\gamma)z}$$

Your mistake is $$|Re(\gamma)| \neq |\gamma|$$

E decays according to $$e^{-Re(\gamma)z}$$
Your mistake is $$|Re(\gamma)| \neq |\gamma|$$
The absolute value removes the imaginary part, so, basically $$|Re(\gamma)|= |\gamma|$$