What does radar do?

What does radar do?

• A. Detects target's direction, altitude, and range
• B. Measures weather patterns
• C. Detects target's speed only
• D. Determines atmospheric pressure

Answer: (A)

Radar works by sending out radio waves and listening for their reflections. By measuring how long the signal takes to return, you can figure out how far away the target is (its range). By tracking where the reflected signal comes from as the antenna scans, you determine the target’s direction; using elevation information from the scan lets you estimate altitude as well. This combination gives a three‑dimensional position of the target, which is the core capability of radar. Other options describe specialized uses (like weather monitoring) or only one aspect (speed) or say something radar doesn’t measure (atmospheric pressure).

Radar works by sending out radio waves and listening for their reflections. By measuring how long the signal takes to return, you can figure out how far away the target is (its range). By tracking where the reflected signal comes from as the antenna scans, you determine the target’s direction; using elevation information from the scan lets you estimate altitude as well. This combination gives a three‑dimensional position of the target, which is the core capability of radar. Other options describe specialized uses (like weather monitoring) or only one aspect (speed) or say something radar doesn’t measure (atmospheric pressure).