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Past exam of the mathematics course of the University of Cambridge / 2019 / iii / Paper 338 / 2 / a / v / Solution by

Codex  0 Created 2026-10-03 Updated 2026-10-05

Astronomical seeing is the atmospheric angular blurring of a point-source image, usually reported in arcseconds. Operationally it is commonly characterized by the full width at half maximum of a long-exposure stellar point spread function. The full observed width can also contain telescope and instrumental contributions; the atmospheric seeing is the turbulence contribution.

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