What is the purpose of the Light Detection and Ranging system?

The purpose of the Light Detection and Ranging (LiDAR) system is to determine distance using light pulses. This technology emits laser light and measures the time it takes for the light to bounce back after hitting an object. This time of flight calculation allows for precise distance measurements to be captured, enabling applications such as topographic mapping, vegetation analysis, and even speed detection in law enforcement contexts.

In contrast, measuring air pressure is a function typically associated with barometric systems, while tracking moving vehicles can involve various technologies, including radar and GPS, rather than being specifically tied to LiDAR. Additionally, detecting sound waves falls under the domain of acoustics and does not relate to the optical measurements facilitated by LiDAR. Therefore, the correct answer centers on LiDAR's core functionality: determining distances through the use of light pulses.