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- Question
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
- Correct Answer
- temporal variation
- 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
- 2. The GPS space segment consists of Navigation Satellite Timing and Ranging whose number is :
Options- A. 8
- B. 12
- C. 16
- D. 24 Discuss
- 3. For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length lcoh is:
Options- A. 130 km
- B. 230 km
- C. 250 km
- D. 500 km Discuss
- 4. In case of reflection and refraction of electromagnetic radiation,
Options- A. angle of incidence = angle of refraction
- B. angle of incidence = angle of reflection
- C. angle of refraction = sum of the angles of incidence and refraction
- D. All the above Discuss
- 5. Which one of the following statements is correct?
Options- A. ? radians equal to 180°.
- B. The cone subtended by an area on the sphere at the centre, is called the solid angle.
- C. The solid angle is equal to the ratio of the area on the sphere and the square of the radius of the sphere.
- D. The unit of the solid angle is steradian (Sr)
- E. All of these Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. 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
Elements of Remote Sensing problems
Search Results
Correct Answer: angle of refraction is equal to 90°
Correct Answer: 24
Correct Answer: 230 km
Correct Answer: angle of incidence = angle of reflection
Correct Answer: All of these
Correct Answer: 20, 200 km
Correct Answer: both (a) and (b)
Correct Answer: An increase of phytoplankon decreases the back scattering in the green region
Correct Answer: All of these
Correct Answer: sun-synchronous orbit
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