Radar echoes on the display are interpreted to identify objects.

Radar echoes on the display are interpreted to identify objects.

• A. Echoes
• B. Light
• C. Patterns
• D. Shadows

Answer: (A)

Radar works by sending out radio waves and listening for reflections. The returns from those reflections are called echoes, and each echo on the display indicates there is an object at a specific range and bearing. By interpreting these echoes—their timing, position, and strength—you identify and track targets. Light isn’t involved in radar detection, since radar uses radio waves, not visible light. Shadows and patterns aren’t the specific signals radar uses to identify objects, so they don’t describe what the display shows. Echoes are the precise term for the reflected signals that reveal the presence and location of targets.

Radar works by sending out radio waves and listening for reflections. The returns from those reflections are called echoes, and each echo on the display indicates there is an object at a specific range and bearing. By interpreting these echoes—their timing, position, and strength—you identify and track targets.

Light isn’t involved in radar detection, since radar uses radio waves, not visible light. Shadows and patterns aren’t the specific signals radar uses to identify objects, so they don’t describe what the display shows. Echoes are the precise term for the reflected signals that reveal the presence and location of targets.