What does radar stand for?

Radar stands for "Radio Detection and Ranging." This term encapsulates the fundamental purpose and function of radar technology. The "Radio" component indicates that it utilizes radio waves to transmit signals, while "Detection and Ranging" refers to its capability to detect objects and determine their distance based on the time it takes for the radio signals to return after bouncing off an object.

The correct understanding of radar is essential in multiple applications, particularly in military contexts, where fire control systems rely on radar technology for tracking targets and guiding weapons systems effectively. In contrast, the other options presented do not accurately describe radar's fundamental principles or components, making them less relevant in the context of defining what radar actually stands for.