Elements Of Remote Sensing
In case of reflection and refraction of electromagnetic radiation,

Angle of incidence = angle of refraction
Angle of incidence = angle of reflection
All listed here
Angle of refraction = sum of the angles of incidence and refraction

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Elements Of Remote Sensing
Geodimeter is based on:

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

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