Discussion
Given below are two statements :
Statement I : When a wave in air is incident on a perfect conductor normally, it is entirely reflected.
Statement II : There are no losses within a perfect conductor, no energy is absorbed in it.
In the light of the above statements, choose the most appropriate answer form the options given below.
Answer: D
Both Statement I and Statement II are true.
Statement I is true: a perfect conductor has infinite conductivity and zero intrinsic impedance, so the reflection coefficient at its surface is −1. A wave striking it normally is entirely reflected, setting up a standing wave in the air in front of it.
Statement II is true: the fields inside a perfect conductor are zero, and with no resistance there is no ohmic loss, so no energy is absorbed. Both statements describe the same ideal case from two sides, so every option calling one of them false is wrong.
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