Elements of Remote Sensing problems
- 1. Critical angle of electromagnetic radiation takes place if
Options- A. angle of incidence is equal to angle of refraction
- B. angle of incidence is greater than the angle of refraction
- C. angle of incidence is equal to 90°
- D. angle of refraction is equal to 90° Discuss
Correct Answer: angle of refraction is equal to 90°
- 2. The changes in the reflectivity/emis-sivity with time, is called :
Options- A. spectral variation
- B. spatial variation
- C. temporal variation
- D. None of these Discuss
Correct Answer: temporal variation
- 3. The normal altitude of GPS satellite is about
Options- A. 16, 200 km
- B. 20, 200 km
- C. 24, 400 km
- D. 36, 100 km Discuss
Correct Answer: 20, 200 km
- 4. While propagating through homogeneous, isotropic media,
Options- A. directions of both the fields are orthogonal
- B. both the fields are at right angles to the direction of propagation.
- C. both (a) and (b)
- D. niether (a) nor (b) Discuss
Correct Answer: both (a) and (b)
- 5. Pick up the correct statement from the following:
Options- A. Phytoplankton contains photosyn-thetically active pigment.
- B. An increase of phytoplankton increases the back scattering in the green region
- C. An increase of phytoplankton absorbs the bule region rapidly
- D. An increase of phytoplankon decreases the back scattering in the green region Discuss
Correct Answer: An increase of phytoplankon decreases the back scattering in the green region
- 6. Pick up the correct statement from the following:
Options- A. A graphical representation of spectral reflectance versis the various growth stages of a crop, depicts a phenologic pattern
- B. The changes in the polarisation of the radiation reflected or emitted by an object, is known as polarisation variation.
- C. The degree of polarisation is a characteristic of the object which helps in the identification of the object.
- D. Signatures only provide statistical nature and are not completely deterministic
- E. All of these Discuss
Correct Answer: All of these
- 7. For interpolation of satellite data used for monitoring dynamic changes that occure on the earth surface, the most suitable orbit for the satellite is :
Options- A. circular orbit
- B. sun-synchronous orbit
- C. near polar orbit
- D. None of these Discuss
Correct Answer: sun-synchronous orbit
- 8. Which one of the following quantities forms the basis of radiometery?
Options- A. Radiant energy (Q)
- B. Radiant flux (?)
- C. Radiant intensity (I)
- D. Radiance (L)
- E. All of these Discuss
Correct Answer: All of these
- 9. Which one of the following statements is correct?
Options- A. The function of an information system is to improve ones ability to make decisions
- B. The information system is the chain of operations
- C. A map is a collection of stored, analysed data, its stored information is suitability used in making decisions
- D. All the above Discuss
Correct Answer: All the above
- 10. Due to scan geometery of a satellite sensor:
Options- A. the off-nadir resolution is degraded
- B. the ground distance swept by the senor, IFOV is proportional to sec2?, where ? is the angle of scan measured from the nadir
- C. the details towards the edge of the scan get compressed
- D. All of these Discuss
Correct Answer: All of these
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