What does RADAR stand for?

What does RADAR stand for?

• A. Radio Detection and Ranging
• B. Radiant Detection and Ranging
• C. Remote Detection and Reading
• D. Rapid Detection and Ranging

Answer: (A)

RADAR stands for Radio Detection and Ranging. Here, "radio" refers to the radio waves used to probe the scene, "detection" means sensing that an object is present, and "ranging" is the measurement of how far away that object is. Radar works by emitting a short radio pulse and listening for echoes, using the return signal to determine distance (and often speed) to targets. The other phrases don’t fit the established term; they would change the meaning (for example, "radiant" or "remote" or "rapid" aren’t the standard words used in this acronym).

RADAR stands for Radio Detection and Ranging. Here, "radio" refers to the radio waves used to probe the scene, "detection" means sensing that an object is present, and "ranging" is the measurement of how far away that object is. Radar works by emitting a short radio pulse and listening for echoes, using the return signal to determine distance (and often speed) to targets. The other phrases don’t fit the established term; they would change the meaning (for example, "radiant" or "remote" or "rapid" aren’t the standard words used in this acronym).