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## Homework Statement

If the electric field in free space is E=Eo(x^+y^)sin(2pi/lamda)(z+ct), with Eo=2 statvolts/cm the magnetic field, not including any static magnetic field, must be what?

**2. Relevant equation**

∇ x B= 1/c ∂E/∂t

## The Attempt at a Solution

First I calculated ∂E/∂t= cE0/c (x^+y^)cos(2pi/lamba)(x+ct)

Since B is perpendicular to E, it just has a z^ direction.

∇xB=∂yBzx^-∂xBzj^.

Then I equal both equations and I got Bz=Boc(yx^-xj^) cos...

Is this right ?