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

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

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Elements Of Remote Sensing
Geodimeter is based on:

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

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