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Chapter 2:
Electromagnetic Basics
The previous chapter discussed various remote sensing modalities and some characteristics of modern systems; at this point, it is necessary to review some basic physics relevant to electromagnetic waves and remote sensing. The chief things to understand are the electromagnetic (EM) spectrum and EM radiation, of which light, radar, and radio waves are examples. This section takes a brief look at the physical equations that underlie EM waves, the wave equations that result, their energy in the context of the photoelectric effect, sources of EM radiation, and some fundamental interactions of EM waves with matter.
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