Answer: Infrared is the answer
Explanation: Infrared (Wavelength ~ 10-6 to 10-3 meters)
The infrared portion of the spectrum ranges from approximately 0.75 µm to 100 µm (750 nm - 10,000 nm) 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 from 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.
