Blackbody Prediction for CMBR: Alpher, Herman, and Gamow's 1948 Theory

[TrickyDicky]

I know the CMBR temperature was approximately predicted by Alpher ,Herman and Gamow around 1948, but I can't locate a source specifying when and how the blackbody form of the CMBR was predicted.
Does anybody have this information?

thanks

 

[russ_watters]

How about this:

Dicke and his colleagues reasoned that the Big Bang must have scattered not only the matter that condensed into galaxies but also must have released a tremendous blast of radiation. With the proper instrumentation, this radiation should be detectable.

http://en.wikipedia.org/wiki/Discovery_of_cosmic_microwave_background_radiatio

and:

After 10−6 seconds, the early universe was made up of a hot plasma of photons, electrons, and baryons. The photons were constantly interacting with the plasma through Thomson scattering. As the universe expanded, adiabatic cooling caused the plasma to cool until it became favorable for electrons to combine with protons and form hydrogen atoms. This recombination event happened at around 3000 K or when the universe was approximately 379,000 years old.[8][nb 4] At this point, the photons scattered off the now electrically neutral atoms and began to travel freely through space, resulting in the decoupling of matter and radiation.[9]

http://en.wikipedia.org/wiki/Discovery_of_cosmic_microwave_background_radiation

Basically, the early universe was hot plasma and hot plasma emits a black body spectrum of radiation. When it cooled below a certain temperature and matter started to condense into atoms, it became transparent. That temperature is the temperature at which the radiation was then released to travel unabated through the universe as the CMB.

 

[TrickyDicky]

Yes, I read that in wikipedia. But that is not what I asked, I was interested in knowing if and when someone, before CMBR was detected, had specifically predicted the almost perfect blackbody quality of this radiation. It is more of a cosmology history question than a conceptual question.
Perhaps somebody has studied this in this cosmology forum?

 

[Chronos]

See: http://www.talkorigins.org/faqs/astronomy/bigbang.html
http://www.aspera-eu.org/index.php?option=com_content&task=view&id=347&Itemid=97

 

[sardar]

Yes, the prediction of the blackbody form of the CMBR by Alpher, Herman, and Gamow in 1948 was a significant development in our understanding of the early universe. This prediction was based on their work on Big Bang nucleosynthesis and the cosmic microwave background radiation (CMBR). They were able to calculate the temperature of the CMBR and predicted that it would have a blackbody distribution, meaning that its spectrum would match that of a perfect thermal emitter. This prediction was later confirmed by observations in the 1960s, providing strong evidence for the Big Bang theory.

The specific source for this prediction can be found in the paper "The Origin of Chemical Elements" by Alpher, Herman, and Gamow, published in Physical Review in April 1948. In this paper, they state that the CMBR should have a temperature of approximately 5 K, which is consistent with a blackbody distribution. They also discuss the implications of this prediction for the early universe and the formation of chemical elements.

It is important to note that while Alpher, Herman, and Gamow made this prediction in 1948, it was not until 1965 that Arno Penzias and Robert Wilson discovered the CMBR, providing direct evidence for its existence. This discovery was a major confirmation of the Big Bang theory and the prediction made by Alpher, Herman, and Gamow. I hope this information helps to clarify the timeline and significance of the blackbody prediction for the CMBR.