Differences between polarisations and temperature anisotropies in the

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pleasehelpmeno
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Basically as the questions says, can anyone explain what E and B mode polarisations are and homework they differ from temp anisotropies.

I know that E mode are from scalar and tensor perturbations B mode from tensor perturbations (Gwaves). I don't really understand what they are or how they differ from the change in temp.

Any recommended literature would be helpful
 

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See http://cosmology.berkeley.edu/~yuki/CMBpol/CMBpol.htm