Elements Of Remote Sensing
The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called:

Reflectance
Reflectance factor
None of these
Albedo

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Elements Of Remote Sensing
Geodimeter is based on:

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

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