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MCQs

Total Questions : 687 | Page 2 of 69 pages
Question 11. Which one of the following frequency regions is a part of sun's radiation?
  1.    Ultraviolet frequency region
  2.    Infrared frequency region
  3.    Radio frequency region
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 12. The refractive index of the ocean water:
  1.    Increases with salinity
  2.    Increases with temperature
  3.    Decreases with salinity
  4.    Decreases with temperature
 Discuss Question
Answer: Option A. -> Increases with salinity
Question 13. The changes in the reflectivity/emissivity with time, is called:
  1.    Spectral variation
  2.    Spatial variation
  3.    Temporal variation
  4.    None of these
 Discuss Question
Answer: Option C. -> Temporal variation
Question 14. Rayleigh's criteria for a rough surface is: (where letters carry their usual meanings).
  1.    h > λ/Δ cos θ
  2.    h = λ/8 cos θ
  3.    h > λ/8 cos θ
  4.    h < λ/8 cos θ
 Discuss Question
Answer: Option C. -> h > λ/8 cos θ
Question 15. Which one of the following relationship between the wave length (λ), and frequency and the speed (C) of the electromagnetic wave is correct?
  1.    C = v + λ
  2.    C = λ/v
  3.    C = vλ
  4.    C = 1/λv
 Discuss Question
Answer: Option C. -> C = vλ
Question 16. Who coined the term, ‘Remote sensing’.
  1.    Evelyn L. Pruitt, a geographer
  2.    Gaspard Felix Tournachon, a French scientist
  3.    Wilbur Wright, an Italian scientist
  4.    None of these
 Discuss Question
Answer: Option A. -> Evelyn L. Pruitt, a geographer
Question 17. According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n₁) on another medium (refractive index m₂);
  1.    The angle of incidence is equal to the angle of refraction
  2.    The angle of refraction (θr) is given by sin θ₂ = (n₁/n₂) sin θi
  3.    Both (A) and (B)
  4.    Neither (A) nor (B)
 Discuss Question
Answer: Option B. -> The angle of refraction (θr) is given by sin θ₂ = (n₁/n₂) sin θi
Question 18. Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its
  1.    Six ground stations
  2.    Five ground stations
  3.    Four ground stations
  4.    Three ground stations
 Discuss Question
Answer: Option B. -> Five ground stations
Question 19. The most widely used antenna in GPS is
  1.    Parabolic antenna
  2.    Microstrip antenna
  3.    Horn antenna
  4.    Slotted antenna
 Discuss Question
Answer: Option B. -> Microstrip antenna
Question 20. The normal altitude of GPS satellite is about
  1.    16,200 km
  2.    20,200 km
  3.    24,400 km
  4.    36,100 km
 Discuss Question
Answer: Option B. -> 20,200 km

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