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Elements Of Remote Sensing

Elements Of Remote Sensing
Which one of the following helps to identify the objects on the earth surface?

Signature
Atmospheric window
None of these
Radiometric error

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Elements Of Remote Sensing
Electromagnetic radiation:

Once generated, remains self-propagating
Is capable to travel across space
All of these
Produces a time varying magnetic field and vice versa

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Elements Of Remote Sensing
The normal altitude of GPS satellite is about

24,400 km
36,100 km
16,200 km
20,200 km

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Elements Of Remote Sensing
The reflection of solar energy is characterized by the water content in the leaf, in the reflective optical infrared:

None of these
Near-IR (0.7 - 1.3 μm) region
Short wave-IR (1.3 - 2.7 μm) region
Visible (0.4 - 0.7 μm) region

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Elements Of Remote Sensing
Electromagnetic spectrum contains:

Infrared rays (wave length < 10⁻⁴ m)
Ultraviolet rays (wave length < 10⁻⁶ m)
All of these
Gamma rays (wave length < 10⁻¹⁰ m)

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Elements Of Remote Sensing
Which one of the following relationship between the wave length (λ), and frequency and the speed (C) of the electromagnetic wave is correct?

C = vλ
C = 1/λv
C = λ/v
C = v + λ

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