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A. The cosmic microwave background radiation is expected to contain spectral features due to hydrogen and helium, and it does.
B. The cosmic microwave background radiation is expected to have tiny temperature fluctuations; such fluctuations were found in the COBE data.
C. The cosmic microwave background radiation is expected to have nearly a perfect black body spectrum; observations from the COBE spacecraft verify this prediction.
D. The cosmic microwave background radiation is expected to have a temperature just a few degrees above absolute zero; its actual temperature is about 2.7 K.
E. The cosmic microwave background radiation is expected to look essentially the same in all directions, and it does.

2007-04-25 14:27:14 · 3 answers · asked by evilweather88 1 in Science & Mathematics Physics

3 answers

The answer is A. The CMBR shows that the early universe was a nearly perfect blackbody radiator. This means that it has a continuous spectrum.

It is true that there are fluctuations as it says in B.
E is not the correct answer because these fluctuations are very small. So it is essentially the same in all directions. The temperature varies by about 0.0006 percent.

2007-04-25 19:59:13 · answer #1 · answered by Demiurge42 7 · 0 0

Strangely enough the non-homogenous nature of the Cosmic Background Radiation (CBR) also correlate to structures observed on the superscale, odd that the nature of the CBR 380,000 years after the Big Bang led to galaxy clusters and nebula huh.

Take a peek at the CMB data mentioned above at:
http://en.wikipedia.org/wiki/Image:WMAP.jpg

2007-04-25 21:45:09 · answer #2 · answered by carmicheal99 1 · 0 0

E. The CMB shows tiny fluctuations and irregularities when analyzed in minute detail.

2007-04-25 21:31:15 · answer #3 · answered by Anonymous · 0 1

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