= Richard Quentin Twiss
{c}
{tag=Physicist}
{title2=1920–2005}
= Richard Q. Twiss
{c}
{synonym}
= R. Q. Twiss
{c}
{synonym}
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>.<A Test of a New Type of Stellar Interferometer on Sirius by Robert Hanbury Brown and Richard Quentin Twiss>[Original 1956 stellar-interferometer report]{ref}
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