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:

None of these
Snell's law
Fresnel reflection
Fresnel refraction

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

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

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

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