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);

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

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

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

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Elements Of Remote Sensing
Geodimeter is based on:

Propagation of infrared radiation
Propagation of modulated light waves
The visible light as carrier with frequency of the order of 5 × 1014 Hz
High frequency radio waves

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Elements Of Remote Sensing
Which one the following is a correct statement?

The vertical section of the soil extending into the parent material, is called profile
The layers of the soil parallel to the earth surface are called horizons
The transitional layer between two adjoining horizons is called boundary
All of these

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