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?
AThe Earth's magnetic field diverts them towards its poles
BOzone layer around the Earth reflects them back to outer space
CMoisture in the upper layers of atmosphere prevents them from reaching the surface of the Earth
DNone of the statements (a), (b) and (c) given above is correct
Answer & Solution
Correct answer: A. The Earth's magnetic field diverts them towards its poles
UPSC CSE Prelims 2012 (GS-I, Set A), Q.20. Answer key: A (coaching consensus; UPSC did not publish an official 2012 AK separately on upsc.gov.in).
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