Elements Of Remote Sensing
The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths:

All of these
0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 μm
2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 μm
4.2 to 5.0, 7.0 to 15.0 μm and 1 cm to 30 cm

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Elements Of Remote Sensing
Geodimeter is based on:

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

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