Which of the following is true regarding RADAR signals?

RADAR signals are indeed affected by weather conditions, making this the correct answer. The technology operates by sending out radio waves and measuring the time it takes for the signals to bounce back after hitting an object. Various weather phenomena, such as rain, fog, snow, or even dust, can disperse or absorb these signals, thereby impacting their accuracy and effectiveness. This susceptibility to weather conditions is a crucial consideration in the use of RADAR for speed detection and other applications, as adverse weather can hinder the performance of the system and lead to incorrect readings.

The other choices present misconceptions about RADAR technology. While speed measurements are typically more precise on flat surfaces due to reflection issues, RADAR is capable of functioning in a variety of terrains, making the assertion that it can only measure speed on flat surfaces incorrect. Additionally, RADAR does rely on the relative movement between the observer (the RADAR unit) and the target object to accurately measure speed; thus, it does not operate independently of vehicle movement. Lastly, while RADAR waves have lower frequency and longer wavelengths compared to LIDAR, stating that RADAR has a higher wavelength than LIDAR is misleading, as LIDAR typically operates in the visible and near-infrared spectrum with much