Elements Of Remote Sensing
In case of reflection and refraction of electromagnetic radiation,

All listed here
Angle of refraction = sum of the angles of incidence and refraction
Angle of incidence = angle of refraction
Angle of incidence = angle of reflection

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

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
All of these
Common boundary between two areas of a locality is known as adjacency

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