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:

Fresnel refraction
Snell's law
Fresnel reflection
None of these

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Elements Of Remote Sensing
Pick up the correct definition from the following with response to GIS.

All of these
Common boundary between two areas of a locality is known as adjacency
The geometric property which describes the linkage between line features is defined as connectivity
The area features which are wholly contained within another area feature, is known so containment

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