Correct option is B
Radar (Radio Detection and Ranging) is a technology that uses radio waves to detect objects and determine their distance, speed, and other characteristics. It is commonly used in a variety of applications, but its utility is specific to certain types of activities.
1. Identification of narcotics on passengers at airports or in aircraft: Not typically done with radar. Narcotics detection is usually carried out using X-ray machines, drug-sniffing dogs, and chemical detection methods like ion mobility spectrometry (used in some airport scanners). Radar is not effective for identifying specific substances like narcotics, as it is designed to detect objects and movement, not chemical compositions.
2. Monitoring of precipitation: Yes, radar is used. Weather radars, specifically Doppler radars, are extensively used to monitor precipitation. They can detect rain, snow, hail, and other forms of precipitation by sending out radio waves and analyzing the waves that are reflected back by precipitation particles.
3. Tracking the migration of animals: Yes, radar can be used. Radar technology is used in wildlife research to track the movement and migration patterns of birds and other animals. Radar can detect the flight paths and behaviors of large flocks of birds, as well as the movement of other animals, particularly in areas that are difficult to observe directly.
