Activities utilizing radar technology

Question

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 C). All three D). None

Edvaya · Accepted Answer

The correct answer is Only two. 1. Identification of narcotics (Incorrect/Highly Debated): While millimeter-wave scanners (a form of radar technology) are used at airports to detect concealed objects under clothing, they detect anomalies/shapes, not the chemical "identification" of narcotics. Identification is done via ion mobility spectrometry or chemical swabs. According to the UPSC key, this activity is excluded. 2. Monitoring of precipitation (Correct): Weather radars (Doppler radar) are explicitly used to locate precipitation, calculate its motion, and estimate its type (rain, snow). 3. Tracking the migration of animals (Correct): Radar ornithology and aeroecology heavily use radar arrays to track the mass migration of birds, bats, and insects in the atmosphere. Therefore, only two of the listed activities are recognized as standard radar use cases. Official Key: (b) Only two

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