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CBSE Class 12 · 2023 · EM WavesMultiple Choice

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and represent the electric and magnetic fields of an electromagnetic wave respectively. The direction of propagation of the wave is along
  1. (A)
  2. (B)
  3. (C)✓ Correct
  4. (D)

Answer: (C)

Solution

In an electromagnetic wave , and the direction of propagation are mutually perpendicular, and the wave travels along (the direction of the Poynting vector). would give the opposite (backward) direction, so the correct choice is .

CBSE Class 12 Board · 2023 · Single correct option

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