How does a radar function?

How does a radar function?

• A. Transmits RF energy and receives reflections from target
• B. Only transmits RF energy
• C. Only receives reflections from target
• D. Detects weather patterns

Answer: (C)

Radar works by transmitting RF energy and listening for echoes from objects. The emitted signal travels outward and, when it hits a target, portions of it bounce back and are received by the radar. By measuring how long the transmission took to produce an echo, the system determines distance; by scanning where the echoes come from, it finds the target’s position; and by analyzing any changes in frequency of the returned signal, it can infer motion toward or away from the radar. While radar can be used to observe weather patterns, the fundamental operation is sending energy and receiving reflections.

Radar works by transmitting RF energy and listening for echoes from objects. The emitted signal travels outward and, when it hits a target, portions of it bounce back and are received by the radar. By measuring how long the transmission took to produce an echo, the system determines distance; by scanning where the echoes come from, it finds the target’s position; and by analyzing any changes in frequency of the returned signal, it can infer motion toward or away from the radar. While radar can be used to observe weather patterns, the fundamental operation is sending energy and receiving reflections.