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- Question
The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface, are called :
Options- A. sensonrs
- B. passive sensors
- C. active sensors
- D. None of these
- Correct Answer
- active sensors
- 1. Coherence of two electromagnetic waves takes place if their phase difference is :
Options- A. constant in time
- B. constant in space
- C. constant in time and space
- D. None of these Discuss
- 2. Which one of the following relationship between the wave length (?), and frequency and the speed (C) of the electromagnetic wave is correct?
Options- A. C = v + ?
- B.
- C. C = v?
- D.
Discuss
- 3. A perfectly black body :
Options- A. is a diffuse emitter
- B. absorbs all the radiations of every wave lengths
- C. emits power of every wave length
- D. All the above Discuss
- 4. The refractive index of the ocean water:
Options- A. increases with salinity
- B. increases with temperature
- C. decreases with salinity
- D. decreases with temperature Discuss
- 5. Which one the following is a correct statement?
Options- A. The vertical section of the soil extending into the parent material, is called profile
- B. The layers of the soil parallel to the earth surface, are called horizons.
- C. The transitional layer between two adjoining horizons, is called boundary.
- D. All of these Discuss
- 6. A reduction of nitrogen nutrient in plants :
Options- A. affects leaf colour
- B. reduces pigment concentration
- C. increase the visible reflectivity
- D. All of these Discuss
- 7. The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths :
Options- A. 0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 ?m
- B. 2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 ?m
- C. 4.2 to 5.0, 7.0 to 15.0 ?m and 1 cm to 30 cm
- D. All of these Discuss
- 8. Pick up the correct statement from the following :
Options- A. The distance between two successive crests or troughs of a wave, is called, the wave length
- B. The wave length is measured in metres and a fraction of a metre
- C. The wave length is generally denoted by ?
- D. The length of the crest from the mid point, is called amplitude
- E. All of these Discuss
- 9. Pick up the important characteristic of a target which facilitates its identification from the following:
Options- A. spectral variation
- B. spatial variation
- C. temporal variation
- D. polarisation variation
- E. All of these Discuss
- 10. The basic requirement of any sensor system, is :
Options- A. radiometric resolution
- B. spatial resolution
- C. spectral resolution
- D. temporal resolution
- E. All of these Discuss
Elements of Remote Sensing problems
Search Results
Correct Answer: constant in time and space
Correct Answer: C = v?
Correct Answer: All the above
Correct Answer: increases with salinity
Correct Answer: All of these
Correct Answer: All of these
Correct Answer: All of these
Correct Answer: All of these
Correct Answer: All of these
Correct Answer: All of these
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