Consider each of the electric- and magnetic-field orientations. What is the dire

Question

Consider each of the electric- and magnetic-field orientations. What is the direction of propagation or the wave if E = Ei, B = -Bj. 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. What is the direction of propagation of the wave if E = Ej, 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.

Explanation / Answer

From the given question,

The direction of propagation vector is E x B

part A

E = Ei

B= -Bj

E x B=(Ei x -Bj)

= -EB k

propagation vector is (0,0,-1)

part B

E = Ej

B= Bi

E x B=(Ej x Bi)

= -EB k

propagation vector is (0,0,-1)

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