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MCQs

Total Questions : 687 | Page 4 of 69 pages
Question 31. Which one of the following statement is correct?
  1.    Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation
  2.    The rate of transfer of radiant energy is called flux and is expressed in watts
  3.    The radiant energy which falls upon a surface is termed as irradiance
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 32. The coherence length over which there is a strong relationship between amplitudes is;
  1.    Directly proportional to the bandwidth
  2.    Inversely proportional to the bandwidth
  3.    The square of the bandwidth
  4.    None of these
 Discuss Question
Answer: Option B. -> Inversely proportional to the bandwidth
Question 33. Crop Acreage and Production Estimation (CAPE) was funded and taken up in 1983 by:
  1.    USA
  2.    European Union
  3.    Russia
  4.    India
 Discuss Question
Answer: Option D. -> India
Question 34. "An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media". This phenomenon is known as:
  1.    Fresnel reflection
  2.    Fresnel refraction
  3.    Snell's law
  4.    None of these
 Discuss Question
Answer: Option A. -> Fresnel reflection
Question 35. Which one of the following geometric errors of satellite sensors is random?
  1.    Scan skew
  2.    Panoramic distortion
  3.    Earth rotation
  4.    Altitude variation
 Discuss Question
Answer: Option D. -> Altitude variation
Question 36. In GPS, receivers are used are;
  1.    Electronic clocks
  2.    Atomic clocks
  3.    Quartz clocks
  4.    Mechanical clocks
 Discuss Question
Answer: Option C. -> Quartz clocks
Question 37. Geodimeter is based on:
  1.    Propagation of modulated light waves
  2.    Propagation of infrared radiation
  3.    The visible light as carrier with frequency of the order of 5 × 1014 Hz
  4.    High frequency radio waves
 Discuss Question
Answer: Option A. -> Propagation of modulated light waves
Question 38. If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height
  1.    h = dp/(B/H)
  2.    h = (B/H) dp
  3.    h = dp/(H/B)
  4.    h = (H/B) dp
 Discuss Question
Answer: Option A. -> h = dp/(B/H)
Question 39. In case of reflection and refraction of electromagnetic radiation,
  1.    Angle of incidence = angle of refraction
  2.    Angle of incidence = angle of reflection
  3.    Angle of refraction = sum of the angles of incidence and refraction
  4.    All the above
 Discuss Question
Answer: Option B. -> Angle of incidence = angle of reflection
Question 40. Electromagnetic radiation:
  1.    Produces a time varying magnetic field and vice versa
  2.    Once generated, remains self-propagating
  3.    Is capable to travel across space
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these

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