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WHAT is being quantised? the oscillator atoms of the blackbody cavity? or???

thanks

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- Thread starter oheaveno
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- #1

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WHAT is being quantised? the oscillator atoms of the blackbody cavity? or???

thanks

- #2

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It yielded a spectral distribution which didn't "blow up" for any portion of the em. spectrum.

Daniel.

- #3

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you know that graph of wavelength VS intensity.... i understand that the higher the temperature the peak of the graph shifts towards the shorter wavelength because there is more energy (tell me if im wrong) but why is the distribution of wavelength the way it is? why cant there be more longer wavelengths with higher intensity?

one website explains this idea by saying this:: say now you have a certain amount of money. you can spend it on one expensive stuff, or several middle priced stuff, or a lot of cheap stuff. you are still spending that definite amount of money but it is just HOW you decide to spend it. so in the case of BBR, there is a lot of middle wavelengths, a few short wavelengths and a few long wavelengths.

that is what i don't understand. why are there a lot of middle wavelengths but not more shorter wavelengths? i can still distribute the same amount of energy but just in a different way.

i hope you get what i mean because i think my understanding of the concept is very bad

- #4

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oheaveno said:thanks for replying:D but what do you mean by "didnt blow up for any portion of the em spectrum"??

Planck's distribution is bounded (for any temperature) and moreover the area under its graph is finite.

oheaveno said:you know that graph of wavelength VS intensity.... i understand that the higher the temperature the peak of the graph shifts towards the shorter wavelength because there is more energy (tell me if im wrong) but why is the distribution of wavelength the way it is? why cant there be more longer wavelengths with higher intensity?

Thta's tipically for Bose-Einstein statistics. If you study both mathematical statistics and quantum statistical physics, everything will be clear.

Daniel.

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reilly

Science Advisor

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Regards,

Reilly Atkinson

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