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Emissive Power for a Blackbody over a Range of Wavelengths
This Demonstration shows the emissive power for a blackbody over a range of wavelengths, represented by the area under the curve between values
and
.
Planck’s blackbody radiation law gives the spectral density emitted by a blackbody as a function of wavelength and temperature:
where:
λ
is the wavelength, m.
is the absolute temperature of the body, K.
is the first radiation constant:
.
is the second radiation constant:
m K.
The fraction of the total blackbody emission in a spectral band between wavelengths
and
, at temperature
, is given by the integral:
Contributed by:
Rubí Ramírez
Suggested by:
Rafael Fernández
With additional contributions by:
Tomas Garza
and
Rafael Fernández
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.
Reference
[1] F. Kreith, R. Manglik and M. Bohn,
Principles of Heat Transfer
, 7th ed., Stamford, CT: Cengage Learning, 2011.
PERMANENT CITATION
Rubí Ramírez
"
Emissive Power for a Blackbody over a Range of Wavelengths
"
http://demonstrations.wolfram.com/EmissivePowerForABlackbodyOverARangeOfWavelengths/
Wolfram Demonstrations Project
Published: November 30, 2021
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