Blackbody - Note-A-Rific: Blackbody Radiation What is...

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Note-A-Rific: Blackbody Radiation What is Blackbody Radiation Failure of Classical Physics How to Calculate Peak Wavelength What is Blackbody Radiation? As thermal energy is added to an object to heat it up, the object will emit radiation at various wavelengths. All objects emit radiation at an intensity equal to its temperature (in degrees Kelvin, see Glossary) to the fourth power. Intensity = T 4 o At room temperatures, we are not aware of objects emitting radiation because it’s at such a low intensity. o At higher temperatures there is enough infrared radiation that we can feel it. o At still higher temperatures (about 1000K) we can actually see the object glowing red o At temperatures above 2000K, objects glow yellowish or white hot. No real object will absorb all radiation falling on it, nor will it re-emit all of the energy it absorbs. Instead physicists came up with a theoretical model called a Blackbody.
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This note was uploaded on 02/29/2012 for the course PHYS 227 taught by Professor Rabe during the Fall '08 term at Rutgers.

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Blackbody - Note-A-Rific: Blackbody Radiation What is...

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