Cross product relating B, E and direction of propogation?

1. Mar 30, 2004

AndyW

Is there a cross product that releates the magnetic field, electric field, and direction of propogation?

Thanks

2. Mar 30, 2004

Staff: Mentor

Poynting Vector

Yes, the Poynting vector:
$$\vec{S} = \frac{1}{\mu_0} \vec{E} \times \vec{B}$$

3. Mar 31, 2004

Thank you!