# Wave Impdence

1. Oct 6, 2007

### Swapnil

When a em-wave goes from free space to a lossless medium with a $$n > 1$$, why is it that the wave impedence $$\eta$$ becomes smaller i.e. $$\eta = \frac{\eta_0} { n}$$. I know why from the math but I how to get to this result just by some intuitive reasoning?

2. Oct 13, 2007

Anyone?