What does the "R" in LIDAR stand for?

### Concept & Acronyms LIDAR is a remote sensing method that uses light in the form of a pulsed laser to measure variable distances to the Earth or other objects. ### Step-by-Step Solution * **Break Down the Acronym:** The word LIDAR is an acronym similar to RADAR and SONAR. * **Analyze the Letters:** * **LI** stands for Light. * **D** stands for Detection. * **A** stands for And. * **R** stands for **Ranging**. * **Conclusion:** Therefore, the full form is Light Detection and Ranging. ### Exam Strategy & Shortcut Remember the established naming convention for these sensing technologies. RADAR (Radio Detection and Ranging), SONAR (Sound Navigation and Ranging), and LIDAR all end with the word "Ranging", which refers to the process of calculating distance. ### Common Pitfall Guessing "Radar" or "Reflection" because LIDAR bounces light off objects. Always stick to the standard acronym breakdown for scientific detection equipment. ### Final Answer Therefore, the correct answer is **Ranging**.