Consider the following activities : 1. Identification of narcotics on passengers at airports or in aircraft 2. Monitoring of precipitation 3. Tracking the migration of animals In how many of the above activities can the radars be used ?
A
Only one
B
Only two
Correct answer
C
All three
D
None
Explanation
Weather radars, including Doppler radars, monitor precipitation, and radar is widely used to track the migration of birds, bats and insects. Detecting narcotics on passengers is done with X-ray and body scanners, trace detectors and sniffer dogs, not radar. So radar is used in two of the three activities.
Physical Sciences, Chemistry & Materials