# Electric n magnetic field vectors

1. Sep 13, 2005

### benitta

what is the relation between the electric and magnetic field ?
if the electric field vector is e = E exp[i(kx-wt)]j what is the magnetic field vector?

2. Sep 13, 2005

### quasar987

Hi benitta,

I don't believe there is such a relation.

However, the maxwell equations tell us that there is a magnetic field associated with a change in electric field $\partial\vec{E}/\partial{t}$.

3. Sep 13, 2005

### pmb_phy

All you need to do is solve Maxwell's equations. See
http://www.geocities.com/physics_world/em/mawell_eq.htm

Pete

4. Sep 13, 2005

### quasar987

Hi again,

Sorry I misread your question and missed the "t term" in there.

5. Sep 14, 2005

### Galileo

In the case of a plane wave you can find B if you know the direction of propagation.

6. Sep 17, 2005

### benitta

thanks pmb phy