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Home Civil Engineering Elements of Remote Sensing Comments

  • Question
  • The leaf area index (LAI) is :


  • Options
  • A. one sided leaf area per unit area of the ground
  • B. two sided leaf area per -unit area of the ground
  • C. the average of the two sided area per unit area of the ground
  • D. None of these

  • Correct Answer
  • one sided leaf area per unit area of the ground 


  • Elements of Remote Sensing problems


    Search Results


    • 1. Which one of the following frequencies is a GPS?

    • Options
    • A. L1 with frequency 1520 MHz
    • B. L1 with frequency 1575.42 MHz
    • C. L1 with frequency 1227.6 MHz
    • D. L1 with frequency 1280.43 Hz
    • Discuss
    • 2. Identification of crops is affected by:

    • Options
    • A. the spectral characteristics of the sensor
    • B. the spatial characteristics of the sensor
    • C. the radio metric characteristics of the sensor
    • D. All of these
    • Discuss
    • 3. Polarising angle (i) and refractive index (?) of the reflecting surface are related by:

    • Options
    • A. sin i = ?
    • B. cos i = ?
    • C. tan i = ?
    • D.
    • Discuss
    • 4. Pick up the correct statement from to following:

    • Options
    • A. For complete temporal coherence, the waves must be mono chromatic.
    • B. For spatial coherence, the phase difference between two points in space is constant with time.
    • C. Superposition of the coherent waves produce interference
    • D. With 0 phase difference, the constructive interference takes place.
    • E. All of these
    • Discuss
    • 5. GPS has been widely recognized as accurate, fast and cost-effective method for the following:

    • Options
    • A. Collection of the geographic coordinate data used in GIS
    • B. for movement of navigation
    • C. For determination of precise orbit and altitude of low earth orbiting satellites
    • D. All of these
    • Discuss
    • 6. "All bodies at temperatures above absolute zero degree emit electromagnetic radiation at different wave length", is known as:

    • Options
    • A. Plank's law
    • B. Planktan's law
    • C. Lambert's cosine law
    • D. None of these
    • Discuss
    • 7. Snow consists of

    • Options
    • A. snow crystals
    • B. rimed snow crystals
    • C. snow flakes
    • D. All of these
    • Discuss
    • 8. For obtaining accurate distance of the satellite

    • Options
    • A. the GPS receiver slides its codes backwards until it synchronises with the satellite signals
    • B. the signal arrival time is corrected for tropospheric and ionospheric delays
    • C. the carrier phase measurement technique is adopted
    • D. All of these
    • Discuss
    • 9. Depending upon the nature of the targeted object and the wave length of the electromagnetic radiation incident on it, the radiation gets :

    • Options
    • A. reflected
    • B. absorbed
    • C. re-radiated
    • D. transmitted through
    • E. All of these
    • Discuss
    • 10. The solid angle subtended by the sphere is :

    • Options
    • A. 2?
    • B. 3?
    • C. 4?
    • D. 6?
    • Discuss


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