78. In which part of the reflective optical infrared region, the effect of multiple leaves in vegetation canopy is maximum?
A. The near-IR (0.7 ? 1.3 gm) region
B. The visible (0.4 ? 0.7 gm) region
C. The short wave IR (1.3 ?2.7 gm) region
D. In all the above region

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79. The leaf area index (LAI) is :
A. one sided leaf area per unit area of the ground
B. two sided leaf area per unit area of the ground
C. the average of the two sided area per unit area of the ground
D. None of these

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80. Leaf reflactance depends primarily on :
A. the pigments
B. internal cell structure
C. equivalent water content
D. All of these

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81. A reduction of nitrogen nutrient in plants :
A. affects leaf colour
B. reduces pigment concentration
C. increase the visible reflectivity
D. All of these

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82. Which one of the following parameters is considered to determine the reflectance of a vegetation canopy
A. Solar zenith angle
B. Azimuth angle
C. Look angle
D. All of these

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83. Due to scan geometery of a satellite sensor :
A. the of:-nadir resolution is degraded
B. the ground distance swept by the senor, IFOV is proportional to sec2 0, where 0 is the angle of scan measured from the nadir
C. the details towards the edge of the scan get compressed
D. All of these

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84. If 0 is the angle of scan measured from the nadir, the ground distance swept by the sensor IFOV is proportional to:
A. sin2 0
B. cos2 0
C. sec2 0
D. tan2 0

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