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Home Civil Engineering Elements of Remote Sensing Comments

  • Question
  • "An Electromagnetic wave falls on to a boundary between two loss 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 :


  • Options
  • A. Fresnel reflection
  • B. Fresnel refraction
  • C. Snell's law
  • D. None of these

  • Correct Answer
  • Fresnel reflection 


  • Elements of Remote Sensing problems


    Search Results


    • 1. Which one of the following statements is correct?

    • Options
    • A. During the day, earth reflects solar radiation
    • B. During the day earth reflects both solar radiation the emission from its surface
    • C. During the night, earth emits radiation from its surface
    • D. All of these
    • Discuss
    • 2. The most widely used antenna in GPS is

    • Options
    • A. Parabolid antenna
    • B. Microstrip antenna
    • C. Horn antenna
    • D. Slotted antenna
    • Discuss
    • 3. Pick up the correct statement from the following :

    • Options
    • A. Topology describes the geometric characteristic of objects which do not change under transformations and are independent of any coordinate system
    • B. Topological characteristics of an object are independent of scale measurement
    • C. The three elements of topology are adjacency, containment, and connectivity
    • D. All of these
    • Discuss
    • 4. Pick up the correct statement from the following:

    • Options
    • A. Phase of a wave is expressed as a fraction of a period with respect to a refrence
    • B. Phase is usually specified by angular measure with one period being 360°
    • C. The reference for finding the phase of a wave is taken from the previous passage through zero from the negative to the positive direction.
    • D. All of these
    • Discuss
    • 5. Which one of the following statements is correct?

    • Options
    • A. Snow albedo falls at all wave length with the increase of grain size
    • B. The effect of grain size on reflection is maximum in the near-IR region
    • C. The effect of grain size on reflection is low in the visible region of the spectrum
    • D. All of these
    • Discuss
    • 6. The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target,

    • Options
    • A. reduces the contrast of the image and also its sharpness
    • B. increases the contrast of the image but reduces the sharpness
    • C. increases both the contrast and sharpness
    • D. reduces the contrast but increases the sharpness
    • Discuss
    • 7. Which one of the following helps to identify the objects on the earth surface?

    • Options
    • A. atmospheric window
    • B. signature
    • C. radiometric error
    • D. None of these
    • Discuss
    • 8. Pick up the correct statement from the following:

    • Options
    • A. The surface defined by the locus of points having same phase, is called a wave front.
    • B. The wave whose surface of constant phase are parallel planes, is known as a plane wave.
    • C. The relative phase difference between the waves is important and not the absolute phase of a point on the wave
    • D. All of these
    • Discuss
    • 9. In the given figure the phase of

    • Options
    • A. crest A is ?/2
    • B. B crossing is ?
    • C. trough C is 3 ?/2
    • D. All of these
    • Discuss
    • 10. The value of energy quantum for radiation of any frequency is proportional to :

    • Options
    • A. the frequency
    • B. the reciprocal of the energy
    • C. the square of the frequency
    • D. the square root of the frequency
    • Discuss


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