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MCQs

Total Questions : 687 | Page 8 of 69 pages
Question 71. Pick up the correct statement from the following:
  1.    The refractive index of a medium varies according to the wavelength of the radiation
  2.    The variation of the refractive index with wave length, is called dispersion
  3.    The splitting of colors of white light by passing through a prism is caused due to dispersion
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 72. Pick up the correct statement from the following:
  1.    The surface defined by the locus of points having same phase, is called a wave front
  2.    The wave whose surface of constant phase are parallel planes, is known as a plane wave
  3.    The relative phase difference between the waves is important and not the absolute phase of a point on the wave
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 73. Pick up the correct statement from the following:
  1.    Topology describes the geometric characteristic of objects which do not change under transformations and are independent of any coordinate system
  2.    Topological characteristics of an object are independent of scale measurement
  3.    The three elements of topology are adjacency, containment, and connectivity
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 74. Pick up the correct statement from the following:
  1.    When the electric field oscillates in the direction of the electric vector, a plane polarised wave is formed
  2.    When the electric vector is in the plane of incidence, vertical polarisation is formed
  3.    When the electric vector is at right angles to the plane of incidence, horizontal polarization wave is formed
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 75. 'A time varying electric field produces a magnetic field.' This phenomenon is called:
  1.    Hertz's law
  2.    Ampere Maxwell's law
  3.    Faraday's law
  4.    Kirchoff’s law
 Discuss Question
Answer: Option B. -> Ampere Maxwell's law
Question 76. The reflectance from a surface is called specular reflection if it follows:
  1.    Snell’s law
  2.    Lambert
  3.    Planktan
  4.    All of these
 Discuss Question
Answer: Option A. -> Snell’s law
Question 77. The maximum sun's radiation occurs around:
  1.    0.4 μm wave length
  2.    0.55 μ wave length
  3.    0.7 μ wave length
  4.    None of these
 Discuss Question
Answer: Option B. -> 0.55 μ wave length
Question 78. Critical angle of electromagnetic radiation takes place if
  1.    Angle of incidence is equal to angle of refraction
  2.    Angle of incidence is greater than the angle of refraction
  3.    Angle of incidence is equal to 90°
  4.    Angle of refraction is equal to 90°
 Discuss Question
Answer: Option D. -> Angle of refraction is equal to 90°
Question 79. The reflection of solar energy is characterized by the water content in the leaf, in the reflective optical infrared:
  1.    Visible (0.4 - 0.7 μm) region
  2.    Near-IR (0.7 - 1.3 μm) region
  3.    Short wave-IR (1.3 - 2.7 μm) region
  4.    None of these
 Discuss Question
Answer: Option C. -> Short wave-IR (1.3 - 2.7 μm) region
Question 80. Which one the following is a correct statement?
  1.    The vertical section of the soil extending into the parent material, is called profile
  2.    The layers of the soil parallel to the earth surface are called horizons
  3.    The transitional layer between two adjoining horizons is called boundary
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these

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