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The electric field of a plane electromagnetic wave is given by E G = E 0 i ˆ cos(kz) cos ( ω t) The corresponding magnetic field B G is then given by :

1. B G = k ˆ C E 0 sin (kz) cos ( ω t)
2. B G = j ˆ C E 0 sin (kz) sin ( ω t)
3. B G = j ˆ C E 0 sin (kz) cos ( ω t)
4. B G = j ˆ C E 0 cos (kz) sin ( ω t)

Correct answer: B G = j ˆ C E 0 sin (kz) sin ( ω t)

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