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Home Civil Engineering Elements of Remote Sensing Comments

  • Question
  • The semi-infinite snow albedo is proportional to the square root of the grain radius :


  • Options
  • A. in the 0.2 to 0.4 ?m wave length region
  • B. in the 0.4 to 0.8 ?m wave length region
  • C. in the 0.8 to 1.2 ?m wave length
  • D. None of these

  • Correct Answer
  • in the 0.4 to 0.8 ?m wave length region 


  • Elements of Remote Sensing problems


    Search Results


    • 1. Pick up the correct statement from the following:

    • Options
    • A. Water molecules and salt-ions in the ocean scatter the lower wave length more
    • B. An increase in the back scattering coefficient with shorter wave length gives a deep blue colour for clear oceanic water
    • C. The ratio of the upwelling irradiance just below the surface and downwelling irradiance just above the surface is called reflectance ratio.
    • D. All of these
    • Discuss
    • 2. In sun light, water rich in phytoplanktons appears :

    • Options
    • A. red
    • B. green
    • C. brown
    • D. blue
    • Discuss
    • 3. Which one of the following statements is correct?

    • Options
    • A. Each satellite of the GPS system transmits two L band signals.
    • B. The two L band signals are modulated by the Pseudorandom binary codes (PN).
    • C. The GPS receiver reads the specific code of the satellite.
    • D. The PN code determines the time taken by the receiver to reach the receiver which is converted into distance
    • E. All of these
    • Discuss
    • 4. Which one of the following statement is incorrect regarding the electromagnetic radiation?

    • Options
    • A. These are produced by the motion of electric charge
    • B. The oscillation of charged particles sets up changing electric fields.
    • C. The changing electric fields induce the changing magnetic fields in the surrounding medium.
    • D. None of these
    • Discuss
    • 5. Which one of the following attributes is not associated with digital maps

    • Options
    • A. colour
    • B. symbology
    • C. legends
    • D. south arrow
    • Discuss
    • 6. For perfect coherent radiation, which one of the following statement is correct?

    • Options
    • A. Both the waves must have single frequencies
    • B. The directions of motion of both waves are parallel.
    • C. The waves must be collimated
    • D. All of these
    • Discuss
    • 7. Snow albedo is affected by :

    • Options
    • A. wave length
    • B. grain size
    • C. solar zenith angle
    • D. snow pack thickness
    • E. All of these
    • Discuss
    • 8. The energy transported by the electromagnetic wave is proportional to :

    • Options
    • A. the altitude of the wave
    • B. the square of the altitude of the wave
    • C. the cube of the altitude of the wave
    • D. the square roof of the amplitude
    • Discuss
    • 9. Pick up the correct statement from the following:

    • Options
    • A. The wave length of gamma rays is 10-10 m
    • B. The wave length of radio rays is 106 m
    • C. The visible length occupies a small portion of the electromagntic spectrum extending roughly from 0.4 ? m to 0.7?m wave length.
    • D. All of these
    • Discuss
    • 10. Which one of the following is incorrect statement? While passing through the atmosphere, the solar radiation,

    • Options
    • A. remains unaffected
    • B. gets scattered
    • C. gets absorbed partially
    • D. None of these
    • Discuss


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