Question

wavelength=2.9/temperature Wavelength of the radiation at T=4000 K 7.22x10^-7 m What color would this radiation appear to our eyes? red e) The CMB radiation has been stretched by the expansion of space since it originated at the time of recombination. By approximately what factor has the radiation been stretched since recombination? stretch factor = \frac{wavelength \ today}{wavelength \ then} = The \"stretch factor\" is the same as the redshift z from which the radiation arises. The spectrum of the CMB radiation has exactly the shape expected from a \"black body\" thermal radiator with a single temperature. Suppose the CMBR did not come from the nearly uniform, evenly distributed, hot, 4000 K gas at the end of the Era of Nuclei, but rather from many individual stars and galaxies that first formed in the early Universe. How would the spectrum of the CMBR differ from the spectrum we observe?

          wavelength=2.9/temperature
Wavelength of the radiation at T=4000 K
7.22x10^-7 m
What color would this radiation appear to our eyes?
red
e) The CMB radiation has been stretched by the expansion of space since it originated at the time of
recombination. By approximately what factor has the radiation been stretched since recombination?
stretch factor = \frac{wavelength \ today}{wavelength \ then} =
The \"stretch factor\" is the same as the redshift z from which the radiation arises.
The spectrum of the CMB radiation has exactly the shape expected from a \"black body\" thermal
radiator with a single temperature. Suppose the CMBR did not come from the nearly uniform, evenly
distributed, hot, 4000 K gas at the end of the Era of Nuclei, but rather from many individual stars and
galaxies that first formed in the early Universe. How would the spectrum of the CMBR differ from the
spectrum we observe?

wavelength=2.9/temperature
Wavelength of the radiation at T=4000 K
7.22x10^-7 m
What color would this radiation appear to our eyes?
red
e) The CMB radiation has been stretched by the expansion of space since it originated at the time of
recombination. By approximately what factor has the radiation been stretched since recombination?
stretch factor = (wavelength today)/(wavelength then) =
The s̈tretch factorïs the same as the redshift z from which the radiation arises.
The spectrum of the CMB radiation has exactly the shape expected from a b̈lack bodyẗhermal
radiator with a single temperature. Suppose the CMBR did not come from the nearly uniform, evenly
distributed, hot, 4000 K gas at the end of the Era of Nuclei, but rather from many individual stars and
galaxies that first formed in the early Universe. How would the spectrum of the CMBR differ from the
spectrum we observe?

Added by Breanna C.

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