- #1
fluidistic
Gold Member
- 3,923
- 261
If I'm not wrong, empty space (vacuum) has the greatest impedance amongst any material. Because [tex]\eta = \frac{1}{n} \sqrt {\frac{\mu _0}{\epsilon}}[/tex] if I'm not wrong and n=1 (smallest value possible) for free space. What does this mean that free space has a big impedance? It makes the greatest opposition to electromagnetic waves? I'm not getting the meaning of impedance in this case.
P.S.: I've searched in wikipedia, also wave impedance but didn't find any explanation about the meaning of it.
P.S.: I've searched in wikipedia, also wave impedance but didn't find any explanation about the meaning of it.