A physicist who, with Robert Hanbury Brown, developed optical stellar intensity interferometry. Correlations between detected intensity fluctuations reveal spatial coherence even when the optical phases at the detectors are not directly combined. Their experiment on Sirius connected this correlation measurement to stellar angular size, providing an astronomical application of the Hanbury Brown and Twiss effect.[ref]
A Test of a New Type of Stellar Interferometer on Sirius by Robert Hanbury Brown and Richard Quentin Twiss. Original 1956 stellar-interferometer report
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