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Elements Of Remote Sensing

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

None of these
Flying height
Focal length
Ground elevation

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Elements Of Remote Sensing
The most widely used antenna in GPS is

Microstrip antenna
Horn antenna
Slotted antenna
Parabolic antenna

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Elements Of Remote Sensing
A passive sensor uses:

Its own source of energy
Sun as the source of energy
Flash light as a source of energy
None of these

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

None of these
Spectral variation
Temporal variation
Spatial variation

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Elements Of Remote Sensing
In the given figure the phase of

All of these
B crossing is π
Trough C is 3π/2
Crest A is π/2

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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:

Snell's law
Fresnel reflection
Fresnel refraction
None of these

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