ERTH 20 Lecture Notes - Lecture 16: Radiant Intensity, The Cooler, Solar Irradiance
13 Oct 2020
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Document Summary
Basic warming and cooling processes in the atmosphere. Radiation/emission: process by which electromagnetic energy is emitted from an object. Radiation refers to both emission and electromag. energy flow. cooler objs. All objs. emit electromag. energy; hotter objs. are more intense radiators than. The hotter the obj. the more intense its radiation. Temperature is not the only control of radiation intensity. the hotter the object, the shorter the wavelengths of that radiation; cooler bodies radiate mostly long wavelengths. Blackbody radiator: a body that emits the maximum possible amount of radiation at all wavelengths. Absorption: electromagnetic waves striking an object may be assimilated by that object. Short wavelengths of radiation arrive with a higher frequency than do longer wavelengths. increased vibrations result in an increase in the internal energy of the absorbing material leading to increase in temp. An object that is a good radiator is also a good absorber, and a poor radiator is a poor absorber.
