Elements of Remote Sensing problems
- 1. Which one of the following errors is produced by platform characteristics of the sensor?
Options- A. altitude variation
- B. altitude
- C. orbit drift
- D. All of these Discuss
Correct Answer: All of these
- 2. The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:
Options- A. ozone hole
- B. atmospheric window
- C. ozone window
- D. black hole Discuss
Correct Answer: atmospheric window
- 3. The phase difference of the waves 1 and 2 at A in the given figure is :
Options- A. ?/4
- B. ?/2
- C. ?
- D. 3?/2 Discuss
Correct Answer: ?/2
- 4. If 0 is the angle of scan measured from the nadir, the ground distance swept by the sensor IFOV is proportional to :
Options- A. sin2?
- B. cos2?
- C. sec2?
- D. tan2? Discuss
Correct Answer: sec2?
- 5. Pick up the correct statement from the following :
Options- A. When the electric field oscillates in the direction of the electric vector, a plane polarised wave is formed.
- B. When the electric vector is in the plane of incidence, vertical polarisation is formed.
- C. When the electric vector is at right angles to the plane of incidence, horizontal polarization wave is formed.
- D. The plane containing the incident ray and normal to the reflecting surface at the point of incidence is called the plane of incidence.
- E. All of these Discuss
Correct Answer: All of these
- 6. The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from:
Options- A. 10-10 to 106 m
- B. 10-8 to 106 m
- C. 10-10 to 1010 m
- D. 10-8 to 108 m Discuss
Correct Answer: 10-10 to 106 m
- 7. The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called :
Options- A. spectral variation
- B. spatial variation
- C. temporal variation
- D. None of these . Discuss
Correct Answer: spatial variation
- 8. Remote sensing techniques makes use of the properties of-----emitted, reflected or diffracted by the sensed objects:
Options- A. electric waves
- B. soundwaves
- C. electromagnetic waves
- D. wind waves Discuss
Correct Answer: electromagnetic waves
- 9. Electromagnetic radiation :
Options- A. produces a time varying magnetic field and vice versa
- B. once generated, remains self-propagat-ing.
- C. is capable to travel across space
- D. consists of magnetic and electric fields
- E. All of these Discuss
Correct Answer: All of these
- 10. Which one of the following statements regarding remote sensing is correct.
Options- A. The interaction of the electromagnetic radiation with the target
- B. The emission of electromagnetic radiation from the target
- C. both (a) and (b)
- D. Neither (a) nor (b) Discuss
Correct Answer: both (a) and (b)
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