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QuoteQuote from: Dave Lev on Yesterday at 17:46:12Sorry, we can't just replace wavelength & frequency in the redshift formula by temperature.You did.
Quote from: Dave Lev on Yesterday at 17:46:12Sorry, we can't just replace wavelength & frequency in the redshift formula by temperature.
That red shift figure of 1100 is based on two things.The emission peak in hydrogen recombination and the emission peak in the CMBR.Divide one by the other and you get 1100.That's it.It is not based on the BBT.
If you wish to protect this mistake - then please backup your answer by real calculation that is based on law of science and show the math for that.
Please don't try to cover this fatal mistake by claiming that it is only due to my "poor understanding".
However, you are more than welcome to tell that you can't help in this issue anymore.
Unfortunately, somehow our scientists are using temperature in Kelvin and not wavelength in order to calculate the CMBR redshift.Sorry, that is a severe mistake.
QuoteQuote from: Dave Lev on Yesterday at 17:31:39If you wish to protect this mistake - then please backup your answer by real calculation that is based on law of science and show the math for that.I didIt's thishttps://en.wikipedia.org/wiki/Wien%27s_displacement_lawThe only maths you need is that the wavelength is proportional to 1/ the temperature.
Quote from: Dave Lev on Yesterday at 17:31:39If you wish to protect this mistake - then please backup your answer by real calculation that is based on law of science and show the math for that.
"Wien's displacement law states that the black-body radiation curve for different temperatures will peak at different wavelengths that are inversely proportional to the temperature."
We can claim that:At T = 3500K, λrest = 750 nm
Quote from: Dave Lev on 28/02/2023 16:44:34We can claim that:At T = 3500K, λrest = 750 nmThat claim would be wrong.
"For example, using T = 6000 K and parameterization by wavelength, the wavelength for maximal spectral radiance is λ = 482.962 nm with corresponding frequency ν = 620.737 THz. "So, we can all agree that:At T = 6000K λrest = 482.962 nm
https://www.omnicalculator.com/physics/wiens-law
Unfortunately, our scientists have totally failed to understand the real meaning of wiens-law.
"based on the peak wavelength or frequency of its thermal emission spectrum" "you can easily estimate the temperature of an object"
The wavelength of the peak of the BBR tells you the effective temperature.
We can clearly see that as we increase the λ value, the T is going down.
The only maths you need is that the wavelength is proportional to 1/ the temperature.
When we observe that the peak of the black body spectrum is at λ = 2000 then we "can easily estimate the temperature of an object" - and in this case it is T=2.75K.In other words, the λ = 2000 at the CMBR black body spectrum tells us that the temperature of objects that create that λ were only 2.75K.
Wain tells us very clearly that as the CMBR has a black body spectrum and its λ peak value is 2000 then the temperature source MUST be ONLY 2.75K.
And we know what the temperature of the CMBR is.
It actually proves that the CMBR is there due to 2.75 K temperature source
Once you have got that correct, you need to explain what (apart from red shifted very hot hydrogen atoms) could produce the right spectrum for the CMBR.Remember, it has to look like BBR with no superimposed structure; no lines, no bands.
I really want to thank BC for this great Law.
QuoteQuote from: Dave Lev on Today at 05:34:51Wain tells us very clearly that as the CMBR has a black body spectrum and its λ peak value is 2000 then the temperature source MUST be ONLY 2.75K.We know that. I pointed it out a while ago.
Quote from: Dave Lev on Today at 05:34:51Wain tells us very clearly that as the CMBR has a black body spectrum and its λ peak value is 2000 then the temperature source MUST be ONLY 2.75K.
QuoteQuote from: Dave Lev on Today at 05:34:51It actually proves that the CMBR is there due to 2.75 K temperature sourceThis is where you are wrong.You are assuming that nothing has changed since that radiation was emitted.It's important to realise that a gas at 2.75K will not emit BBR.It's "the wrong colour"; it is too "structured".
Quote from: Dave Lev on Today at 05:34:51It actually proves that the CMBR is there due to 2.75 K temperature source
7.When we observe that the peak of the black body spectrum is at λ = 800 then we "can easily estimate the temperature of an object" - and in this case it is T=3500K.
It's important to realise that a gas at 2.75K will not emit BBR
So, given that it can't be cold gas, what do you think is actually emitting BBR at about 2.75K?
So, you disqualify wiens-law because "gas at 2.75K will not emit BBR ".
We do not detect the CMBR at a temp of 2.75K.
That is a quite low energy
However, based on wiens-law we can calculate the source temperature that was needed to for the Black body spectrum when its λ peak value is 2000.
Sorry, you have a fatal mistake!
If the CMBR λ peak was 700 t
If the CMBR λ peak was 700 then we could claim that the source temperature for that peak is 3500K
You reject wiens-Law key message due to the following: