A plane wave is incident normally on a perfect conductor

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A plane wave is incident normally on a perfect conductor as shown below. Here E^r x = H'T and → P are electric fields magnetic field and Poynting vector respectively for the incident wave. The reflected wave should be—

1. E_xr = –E'_x
2. E_y = –H_y
3. → P = – → P
4. E^r_x = E_x
5. (B), (C) and (D)

Correct Option: E

The reflected wave will travel in negative z direction. Hence P = – P and to accommodate the reversal of power flow magnetics field directions is reversed and we get
E_xr = E_xi; H_yr = – H_yi.
Hence alternatives (B), (C) and (D) are correct choices.