Consider the following activities:1. Identification of narcotics on passengers at airports or in aircraft2. Monitoring of precipitation3. Tracking the migration of animals In how many of the above activities can the radars be used?
✓ Correct answer: b) Only two
ExplanationRadar (Radio Detection And Ranging) is an electromagnetic sensor used for detecting, locating, tracking, and recognising objects of various kinds at considerable distances.It operates by transmitting electromagnetic energy toward objects, commonly referred to as targets, and observing the echoes returned from them.The targets may be aircraft, ships, spacecraft, automotive vehicles, astronomical bodies, or even birds, insects, and rain.Besides determining the presence, location, and velocity of such objects, radar can sometimes obtain their size and shape as well.Statement 1 is incorrect: Radar technology is being used in the fight against narcotics, but they are being used for interdiction of suspicious flights/aircraft in countries like Guatemala, Brazil and Bolivia and not directly in the identification of narcotics on passengers or in the aircraft.Statement 2 is correct: Radars, especially Doppler weather radars, are widely used to track precipitation, storm patterns, and weather conditions.Statement 3 is correct: Radars, such as avian radars, are used to monitor the movemen
Practice more Science PYQs
Attempt a free 10-question quiz or browse the full Science & Technology previous-year-question bank with instant answers and explanations.
🔬 Science PYQs →