A
Acoustic monitoring of subterranean seismic shifts along tectonic fault lines
B
Chemical analysis of atmospheric particulate matter in urban industrial corridors
C
Real-time tracking of oceanic salinity and deep-sea current velocities
D
High-precision optical distance measurement and spatial mapping using laser pulses
Correct answer: (d) High-precision optical distance measurement and spatial mapping using laser pulses
Explanation
Option D is correct as LiDAR (Light Detection and Ranging) utilizes light in the form of a pulsed laser to measure ranges and generate precise 3D spatial models. The other options describe sonar, seismology, or air quality monitoring instruments.
Same topic · past papers
UPSC has asked this before
These previous-year questions sit on the same topic. Open one to practise the earlier ask.
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2015 · Q32 · General Studies · 2 marks
With reference to 'Near Field Communication (NFC) Technology', which of the following statements is/are correct? 1. It is a contactless communication technology that uses electromagnetic radio fields. 2. NFC is designed for use by devices which can be at a distance of even a metre from each other. 3. NFC can use encryption when sending sensitive information. Select the correct answer using the codes given below -
2023 · Q9 · General Studies · 2 marks
Consider the following statements: 1. Amarkantak Hills are at the confluence of Vindhya and Sahyadri Ranges. 2. Biligirirangan Hills constitute the easternmost part of Satpura Range. 3. Seshachalam Hills Constitute the southernmost part of Western Ghats. How many of the statements given above the correct? -
2021 · Q4 · GS I · 10 marks
Differentiate the causes of landslides in the Himalayan region and Western Ghats. -
2017 · Q4 · General Studies · 2 marks
From the ecological point of view, which one of the following assumes importance in being a good link between the Eastern Ghats and the Western Ghats? -
2017 · Q58 · General Studies · 2 marks
Consider the following statements: 1. In India, the Himalayas are spread over five states only. 2. Western Ghats are spread over five states only. 3. Pulicat Lake is spread over two States only. Which of the statements given above is/are correct?