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A plane wave striking a perfect conductor at normal incidence is

  • A.totally reflected with the electric field reversed in phase
  • B.totally transmitted into the conductor
  • C.half reflected and half transmitted
  • D.totally reflected with the electric field unchanged in phase

Answer: A

The impedance of a perfect conductor is zero, so the reflection coefficient is minus one and the tangential electric field vanishes at the surface as it must. The reflected and incident waves together form a standing wave with a node at the conductor.

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