Physics · Electromagnetic Waves
The electric field of a plane electromagnetic wave propagating along the x-direction in vacuum is E = E0 ĵ cos(ky - ωt). The corresponding magnetic field B at that moment is given by:
- 1B = E0c î cos(ky - ωt)
- 2B = E0c î cos(ky - ωt)
- 3B = E0c k̂ cos(ky - ωt)
- 4B = E0c k̂ cos(ky - ωt)✓
Correct answer
B = E0c k̂ cos(ky - ωt)
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