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Elements of Remote Sensing - Section 1 (6)

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Elements of Remote Sensing - Section 1

Questions related to Element of Remote Sensing can be
found here in this section and you will get all necessary MCQs of this field.

41. 

Coherence of two electromagnetic waves takes place if their phase difference is :

A. constant in time
B. constant in space
C. constant in time and space
D. None of these

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

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42. 

Due to pertubation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its

A. six ground stations
B. five ground stations
C. four ground stations
D. three ground stations

Answer: Option B

Explanation:

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43. 

The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface, are called :

A. sensonrs
B. passive sensors
C. active sensors
D. None of these

Answer: Option C

Explanation:

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44. 

Which one of the following frequency regions is a part of sun's radiation?

A. Ultraviolet frequency region
B. Visible frequency region
C. Infrared frequency region
D. Radio frequency region
E. All of these

Answer: Option E

Explanation:

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45. 

Pick up the important characteristic of a target which facilitates its identification from the following:

A. spectral variation
B. spatial variation
C. temporal variation
D. polarisation variation
E. All of these

Answer: Option E

Explanation:

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46. 

Electromagnetic radiation :

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

Answer: Option E

Explanation:

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47. 

The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called :

A. spectral variation
B. spatial variation
C. temporal variation
D. None of these .

Answer: Option B

Explanation:

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48. 

The refractive index of the ocean water:

A. increases with salinity
B. increases with temperature
C. decreases with salinity
D. decreases with temperature

Answer: Option A

Explanation:

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