Spectroradiometry For Earth And Planetary Remote Sensing
Spectroradiometry is a technique in Earth and planetary remote sensing, which makes use of light behaviour, specifically how light, light energy is reflected, emitted, and scattering, scattered by substances, to explore their properties in the electromagnetic spectrum, electromagnetic (light) spectrum and identify or differentiate between them. The interaction between radiation, light radiation and the surface of a given material determines the manner in which the radiation reflects back to a detector, i.e., a spectroradiometer. Combining the elements of spectroscopy and radiometry, spectroradiometry carries out precise measurements of electromagnetic radiation and associated parameters within different wavelength ranges. This technique forms the basis of multispectral imaging, multi- and hyperspectral imaging and reflectance, reflectance spectroscopy, commonly applied across numerous geology, geoscience disciplines, which evaluates the spectral properties exhibited by various materia ...
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Light
Light or visible light is electromagnetic radiation that can be perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths). In physics, the term "light" may refer more broadly to electromagnetic radiation of any wavelength, whether visible or not. In this sense, gamma rays, X-rays, microwaves and radio waves are also light. The primary properties of light are intensity, propagation direction, frequency or wavelength spectrum and polarization. Its speed in a vacuum, 299 792 458 metres a second (m/s), is one of the fundamental constants of nature. Like all types of electromagnetic radiation, visible light propagates by massless elementary particles called photons that represents the quanta of electromagnetic field, and can be analyzed as both waves and par ...
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