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UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper I covers general studies.

UPSC Combined Geo-Scientist, Prelims · 2026 · Paper I, General Studies · Q101 of 120

Geo-Scientist Prelims 2026 General Studies Q101: For satellite communication, why are microwave links at 10–12 GHz…

QuestionPhysics / Communication

For satellite communication, why are microwave links at 10–12 GHz preferred?

  1. (a) Microwaves at such frequencies cannot penetrate clouds
  2. (b) Ionosphere reflects these waves strongly
  3. (c) This band lies in low attenuation atmospheric window
  4. (d) Microwaves at such frequencies do not require any antenna

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