Elements Of Remote Sensing
According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n₁) on another medium (refractive index m₂);

The angle of incidence is equal to the angle of refraction
Neither (A) nor (B)
The angle of refraction (θr) is given by sin θ₂ = (n₁/n₂) sin θi
Both (A) and (B)

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Elements Of Remote Sensing
Earth observations from a satellite platform provide:

All of these
Constant solar zenith angles and similar illumination conditions
Synoptic view of a large area
Repetitive observations of the same area with intervals of a few minutes to a few weeks

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

Common boundary between two areas of a locality is known as adjacency
All of these
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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Elements Of Remote Sensing
Which one of the following residual biases involves the GPS accuracy?

All listed here
Receiver-dependent biases due to clock stability with line
Satellite dependent biases due to uncertainty in the orbital parameters of the satellite
Signal propagation biases due to the sphere and troposphere propagation

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