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

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Elements Of Remote Sensing
Which one of the following statements is correct regarding the GPS satellites?

The inclination of axis satellite is 55°
The satellite transmits two L band signals (L1 with 1575.42 MHz and L2 with 1276.6 MHz)
All of these
The nominal altitude is about 20,200 km

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Elements Of Remote Sensing
Due to scan geometry of a satellite sensor:

The details towards the edge of the scan get compressed
The ground distance swept by the senor, IFOV is proportional to sec2θ, where θ is the angle of scan measured from the nadir
The off-nadir resolution is degraded
All of these

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