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2 questions · 2019 · answers as per the UPSC key

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UPSC 2019 · Q32 · Science & Technology › Space Technology & Astronomy · Save

For the measurement/estimation of which of the following are satellite images/remote sensing data used?

  1. Chlorophyll content in the vegetation of a specific location
  2. Greenhouse gas emissions from rice paddies of a specific location
  3. Land surface temperatures of a specific location

Select the correct answer using the code given below.

(a) 1 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
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Answer: (d) 1, 2 and 3
UPSC 2019 · Q97 · Science & Technology › Space Technology & Astronomy · Save

Recently, scientists observed the merger of giant ‘blackholes’ billions of light-years away from the Earth. What is the significance of this observation?

(a) ‘Higgs boson particles’ were detected.
(b) ‘Gravitational waves’ were detected.
(c) Possibility of inter-galactic space travel through ‘wormhole’ was confirmed.
(d) It enabled the scientists to understand ‘singularity’.
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Answer: (b) ‘Gravitational waves’ were detected.