What is the term for the area behind an object where the radar transmission is masked?

• A. Echo zone
• B. Shadow area
• C. Blind spot
• D. Fade region

Answer: (B)

When a solid object blocks the radar beam, energy cannot reach anything behind it along that path, so no echoes return from targets in that region. That hidden area is called the shadow area. The term captures the idea of a “shadow” cast by the object in the radar’s view, where transmission is masked and returns are absent.

Other terms aren’t the standard description here: a blind spot is a broader sensor limitation, fade region refers to signal strength changes due to propagation rather than occlusion, and echo zone isn’t the conventional name for this occlusion effect.