Problem: Consider each of the electric- and magnetic-field orientationsWhat is the direction of propagation of the wave if E = - Ek^, B  = - Bi^. Express the direction of the propagation vector, P, as a unit vector. Its three components should be entered in order (x,y,z) separated by commas. For example, if the wave propagates only in the -x direction, enter -1,0,0. <-- for all of them

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Unit vector cross product:

$\boxed{\begin{array}{rcl}\mathbf{i}\mathbf{ }\mathbf{\times }\mathbf{ }\mathbf{j}& \mathbf{=}& \mathbf{k}\\ \mathbf{j}\mathbf{ }\mathbf{\times }\mathbf{ }\mathbf{i}& \mathbf{=}& \mathbf{-}\mathbf{ }\mathbf{k}\\ \mathbf{j}\mathbf{ }\mathbf{\times }\mathbf{ }\mathbf{k}& \mathbf{=}& \mathbf{i}\\ \mathbf{k}\mathbf{ }\mathbf{\times }\mathbf{ }\mathbf{j}& \mathbf{=}& \mathbf{-}\mathbf{ }\mathbf{i}\\ \mathbf{k}\mathbf{ }\mathbf{\times }\mathbf{ }\mathbf{i}& \mathbf{=}& \mathbf{j}\\ \mathbf{i}\mathbf{ }\mathbf{\times }\mathbf{ }\mathbf{k}& \mathbf{=}& \mathbf{-}\mathbf{ }\mathbf{j}\\ \mathbf{i}\mathbf{ }\mathbf{\times }\mathbf{ }\mathbf{i}& \mathbf{=}& \mathbf{0}\\ \mathbf{j}\mathbf{ }\mathbf{\times }\mathbf{ }\mathbf{j}& \mathbf{=}& \mathbf{0}\\ \mathbf{k}\mathbf{ }\mathbf{\times }\mathbf{ }\mathbf{k}& \mathbf{=}& \mathbf{0}\end{array}}$

$\stackrel{\mathbf{\rightharpoonup }}{\mathbf{E}}\mathbf{ }\mathbf{=}\mathbf{ }\mathbf{-}\mathbf{ }\mathit{E}\hat{\mathbf{k}}\mathbf{,}\mathbf{ }\stackrel{\mathbf{\rightharpoonup }}{\mathbf{B}}\mathbf{ }\mathbf{=}\mathbf{ }\mathbf{-}\mathbf{ }\mathit{B}\hat{\mathbf{i}}$

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