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Secondary CMB Anisotropy I: Reionization - Wayne Hu's Tutorials

Secondary CMB Anisotropy I: Reionization - Wayne Hu's Tutorials

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Locally Transparent<br />

• Presently, the matter density is so low that a typical <strong>CMB</strong> photon<br />

will not scatter in a Hubble time (~age of universe)<br />

recombination<br />

transparent<br />

observer

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