Polarization is defined as which of the following?

• A. The orientation of an electromagnetic wave's electric field in relation to the Earth's surface or a reference plane.
• B. The color of the antenna jacket.
• C. The angle of refraction of the RF signal.
• D. The intensity of the RF wave at reception.

Answer: (A)

Polarization is about how the electric field of an electromagnetic wave points as it travels. It is defined by the orientation of the E field relative to a reference plane, such as the Earth's surface or a chosen horizontal plane. This orientation can be vertical, horizontal, or even circular, and it determines how effectively a receiving antenna can pick up the signal because antennas respond to the E-field direction. If the transmitting and receiving antennas match in polarization, reception is maximized; if they’re misaligned, the signal strength drops. The other options describe traits that aren’t about polarization: the color of the antenna jacket has no physical meaning for the wave; the angle of refraction describes bending at media boundaries; and the intensity relates to power, not the field orientation.