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UPSC 2012 › Science & Technology › Space Technology & Astronomy

2 questions · 2012 · answers as per the UPSC key

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UPSC 2012 · Q19 · Science & Technology › Space Technology & Astronomy · Save

Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of universe?

  1. Detection of microwaves in space
  2. Observation of redshift phenomenon in space
  3. Movement of asteroids in space
  4. Occurrence of supernova explosions in space

Select the correct answer using the codes given below :

(a) 1 and 2
(b) 2 only
(c) 1, 3 and 4
(d) None of the above can be cited as evidence
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Answer: (a) 1 and 2
UPSC 2012 · Q20 · Science & Technology › Space Technology & Astronomy · Save

Electrically charged particles from space travelling at speeds of several hundred km/sec can severely harm living beings if they reach the surface of the Earth. What prevents them from reaching the surface of the Earth?

(a) The Earth's magnetic field diverts them towards its poles
(b) and
(c) given above is correct
(d) None of the statements (a),
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Answer: (a) The Earth's magnetic field diverts them towards its poles