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Home Civil Engineering Elements of Remote Sensing Comments

  • Question
  • The maximum sun's radiation occurs around:


  • Options
  • A. 0.4 ?m wave length
  • B. 0.55 ? wave length
  • C. 0.7 ? wave length
  • D. None of these

  • Correct Answer
  • 0.55 ? wave length 


  • Elements of Remote Sensing problems


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

    • Options
    • A. The refractive index of a medium varies according to the wavelength of the radiation,
    • B. The variation of the refractive index with wave length, is called dispersion,
    • C. The splitting of colours of white light by passing through a prism, is caused due to dispersion.
    • D. All the these
    • Discuss
    • 2. Pick up the correct statement from the following :

    • Options
    • A. The minimum frequency of light for which no electrons are emitted, is called threshold frequency.
    • B. Polarising angle of glass is 57°.5
    • C. At the polarising angle, the reflected and refracted rays are orthogonal
    • D. All the above
    • Discuss
    • 3. Repetitive observations of the same area at equal interval of time, are useful to monitor the dynamic phenomena :

    • Options
    • A. Cloud evolution
    • B. Vegetative cover
    • C. Snow cover
    • D. Forest fires
    • E. All of these
    • Discuss
    • 4. The reflectance from a surface is called specular reflection if it follows: .

    • Options
    • A. Snells's law
    • B. Lambert's cosine law
    • C. Planktan's law
    • D. All of these
    • Discuss
    • 5. Pick up the correct statement from the following :

    • Options
    • A. The first man-made satellite, Sputnikl' was launched on 4th October, 1957
    • B. The United State's Explorer 6 transmitted the first picture of the earth in August 1959
    • C. Television Infrared Observation Satellite (TIROS) designed for meteorological observations, started systematic earth observations from space from 1, April, 1960
    • D. U.S.A.'s highly secret mission CORONA started the collection of intelligence photograpy in 1960
    • E. All of these.
    • Discuss
    • 6. If electric permittivity and magnetic permeability of the medium are respectively ? and ?, then the velocity (Cm) of the electromagnetic wave in the medium is given by :

    • Options
    • A.
    • B.
    • C.
    • D. None of these
    • Discuss
    • 7. Consider the following statements regarding the satellite imaging :
      1. The satellite orbit is fixed in the inertial space
      2. During successive across-track imaging, the earth rotates beneath the sensor
      3. The satellite images a skewed area
      Which one of the following statements is/are correct?

    • Options
    • A. 1, 2, 3
    • B. 1, 3
    • C. 2, 3
    • D. 1, 2
    • Discuss
    • 8. The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called:

    • Options
    • A. reflectance
    • B. reflectance factor
    • C. albedo
    • D. none of these
    • Discuss
    • 9. Formation of snow occurs if the cloud temperature is

    • Options
    • A. just above the freezing point
    • B. at the freezing point
    • C. below the freezing point
    • D. None of these
    • Discuss
    • 10. Which one of the following factors does not affect the scale of the air photographs :

    • Options
    • A. focal length
    • B. flying height
    • C. ground elevation
    • D. None of these
    • Discuss


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