Infrared

"The infrared portion of the spectrum ranges from approximately 0.7 µm to 100 µm in wavelength. It is divided up into three main regions, Near Infrared (NIR) 0.7 – 1.3µm, Shortwave Infrared (SWIR) from 1.3 – 3 µm and the Far or Thermal Infrared 3 - 100 µm. Infrared radiation is used extensively in remote sensing. Objects reflect, transmit, and absorb the Sun's near-infrared and shortwave radiation in unique ways and this can used to observe the health of vegetation, soil composition and moisture content. The region from 8 to 15 µm is referred to as thermal infrared since these wavelengths are best for studying the longwave thermal energy radiating from the Earth." (Humboldt State University, 2014)

Sources

"Electromagnetic Spectrum". Humboldt State Geospatial Online, Humboldt State University. 2014.
http://gsp.humboldt.edu/OLM/Courses/GSP_216_Online/lesson1-2/spectrum.h….
Accessed February 1, 2019.

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