![]() In meteorology and climatology, global and local temperatures depend in part on the absorption of radiation by atmospheric gases (such as in the greenhouse effect) and land and ocean surfaces (see albedo).For example, see computation of radio wave attenuation in the atmosphere used in satellite link design. In radio propagation, it is represented in non-line-of-sight propagation.Understanding and measuring the absorption of electromagnetic radiation has a variety of applications. ![]() A few examples of absorption are ultraviolet–visible spectroscopy, infrared spectroscopy, and X-ray absorption spectroscopy.Īpplications Rough plot of Earth's atmospheric transmittance (or opacity) to various wavelengths of electromagnetic radiation, including visible light Precise measurements of the absorbance at many wavelengths allow the identification of a substance via absorption spectroscopy, where a sample is illuminated from one side, and the intensity of the light that exits from the sample in every direction is measured. This may be related to other properties of the object through the Beer–Lambert law. ![]() The absorbance of an object quantifies how much of the incident light is absorbed by it (instead of being reflected or refracted). Which among them practitioners use varies by field and technique, often due simply to the convention.
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