# Seemingly simple question that I managed to be stumped on.

1. Mar 24, 2012

### Xyius

This is in my grad electromagnetism class but it seems like a very simple question so I was unsure of where to post it.

1. The problem statement, all variables and given/known data
All the problem says is to evaluate the following (including units)

$$\sqrt{\frac{\mu_0}{\epsilon_0}}$$

2. Relevant equations

$$\frac{1}{\sqrt{\mu_0 \epsilon_0}}=c$$

3. The attempt at a solution

So using the above formula, this is just simply $\mu_0 c$ which happens to equal around 376.7. The problem is, I do not know what this value is. is this a significant number? The units would be H/s.

2. Mar 24, 2012

### Staff: Mentor

Yes it's a significant number. Hint: units H/s are equivalent to Ohms

3. Mar 24, 2012

### Xyius

I did some internet searching and found an article explaining this. The article says it is called the "Impedance of free space." Gives a pretty good explanation :]

Thanks!