Question

What do the $T, E, B$ in polarization spectra mean?

Answer 1

One can analyze the mapping of the E and B components and T the temperature anisotropy by decomposing them in terms of spherical harmonics. Parity invariance demands that the cross correlation between the pseudoscalar B and the scalars T or E vanishes. more and equations 

Answer 2

Explanation:

Polarization (also polarisation) is a property applying to transverse waves that ... Circularly polarized electromagnetic waves are composed of photons with only one type of spin, either .