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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Elements Of Remote Sensing
Which one of the following residual biases involves the GPS accuracy?

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

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