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

2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 μm
0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 μm
All of these
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
Due to scan geometry of a satellite sensor:

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

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