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Questions about is the electromagnetic radiation remnant from the early stage of the universe, also known as "relic radiation".

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Why are CMB peak heights sensitive to the physical densities

A very simple question: why should it be that the CMB power spectrum allows constraints to be placed on the combination of parameters $$\omega_c = \Omega_c h^2$$ $$\omega_b = \Omega_b h^2$$ as opposed …
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