Consider the spectral emittance for radiation from a blackbody at T=1500 K. Take an oscillator that emit photons with a wavelength of 5 micrometer and another oscillator that emit photons with a wavelength 0.5 micrometer.
Consider the spectral emittance for radiation from a blackbody at T=1500 K. Take an oscillator that emit photons with a wavelength of 5 micrometer and another oscillator that emit photons with a wavelength 0.5 micrometer.
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Transcribed Image Text:Consider the spectral emittance for radiation from a blackbody at
T=1500 K. Take an oscillator that emit photons with a wavelength
of 5 micrometer and another oscillator that emit photons with a
wavelength 0.5 micrometer.
Transcribed Image Text:Thermal energy ( in ev) at 1500 K is
The population ratio of the number of low-frequency
oscillator in the first excited state to that of the
ground state is
The population ratio of the number of high-frequency
ocillator in the first excited state to that of the
ground state is
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