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Elements Of Remote Sensing

Elements Of Remote Sensing
The changes in the reflectivity/emissivity with time, is called:

Spectral variation
Spatial variation
Temporal variation
None of these

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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:

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

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Elements Of Remote Sensing
Repetitive observations of the same area at equal interval of time are useful to monitor the dynamic phenomena:

Vegetative cover
Snow cover
Cloud evolution
All of these

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Elements Of Remote Sensing
Which one of the following factors does not affect the scale of the air photographs?

Focal length
None of these
Ground elevation
Flying height

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Elements Of Remote Sensing
Formation of snow occurs if the cloud temperature is

None of these
At the freezing point
Below the freezing point
Just above the freezing point

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Elements Of Remote Sensing
"An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media". This phenomenon is known as:

None of these
Snell's law
Fresnel refraction
Fresnel reflection

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