Soo-saareyaasha infrared-ka iyo shucaaca jidhka madow
Cashar 4 / 27
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Natiijada casharka
I can describe how to investigate the emission of infrared by different surfaces, state what is meant by a ‘black body’ radiator and explain how radiation affects an object’s temperature.
Muuji qoraalka
All bodies (objects) of all temperatures emit and absorb infrared radiation. Hotter bodies emit more IR in a set time.
The range of wavelengths emitted, and their intensities, depend on an object’s temperature.
Good absorbers (e.g. dark and dull surfaces) are also good emitters. Shiny metal surfaces are poor absorbers/emitters.
A black body is a theoretical object that absorbs all of the radiation that falls on it.
The temperature of a body depends on the rates at which radiation is absorbed and emitted.
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Imtixaankan weli diyaar ma aha.
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