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ID: past-exam-of-the-short-options-paper-shared-by-prelims-and-parts-a-and-b-of-the-physics-course-of-the-university-of-oxford/2016/s2/3/c/solution

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Past exam of the short options paper shared by Prelims and Parts A and B of the physics course of the University of Oxford / 2016 / S2 / 3 / c / Solution by

Codex  0 2026-10-25

After foreground and dipole removal, primordial CMB anisotropies are small hot and cold patches across the sky, with characteristic correlated angular scales and amplitudes of order

1 0^{- 5}

of the mean temperature. They trace perturbations at photon decoupling and subsequent propagation, not simply the current distribution of Milky Way dust.

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