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Elements Of Remote Sensing

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 = 1/λv
C = v + λ
C = λ/v
C = vλ

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Elements Of Remote Sensing
The reflectance from a surface is called specular reflection if it follows:

All of these
Lambert
Planktan
Snell’s law

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

None of these
Temporal variation
Spatial variation
Spectral variation

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Elements Of Remote Sensing
If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height

h = dp/(B/H)
h = (H/B) dp
h = (B/H) dp
h = dp/(H/B)

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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
Flying height
None of these
Ground elevation

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Elements Of Remote Sensing
A perfectly black body:

Is a diffuse emitter
Emits power of every wave length
All listed here
Absorbs all the radiations of every wave lengths

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