Elements Of Remote Sensing
Electromagnetic spectrum contains:

All of these
Infrared rays (wave length < 10⁻⁴ m)
Gamma rays (wave length < 10⁻¹⁰ m)
Ultraviolet rays (wave length < 10⁻⁶ m)

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Elements Of Remote Sensing
Due to scan geometry of a satellite sensor:

The details towards the edge of the scan get compressed
All of these
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

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