- Richard Q. Twiss
Richard Q. Twiss (1920 –
20 May ,2005 ) is famous for his work on theHanbury-Brown and Twiss effect withRobert Hanbury Brown . This led to the development of the Hanbury Brown-Twiss intensityinterferometer in the UK in 1954. Their work was controversial as it appeared to contradict the established beliefs aboutquantum interference . He and Brown received theEddington Medal of theRoyal Astronomical Society for their work in 1968.Richard Twiss was born in Simla in
India but was educated inEngland . He readmathematics at Cambridge, completing theMathematical Tripos with distinction, but his early contributions were to the theory ofradar and basicelectronics . His work in this area wasincluded in the famous "five foot shelf"--a series of reference books inelectronic engineering compiled atMIT that was the circuit designer's bible in the 1950s. He was awarded aDoctor of Science degree by MIT in 1949.Twiss went on to help construct the
Narrabri Stellar Intensity Interferometer . Observations with the interferometer began in 1965. Measurements made between 1965 and 1974 were used to establish the temperature scale forstar s hotter than theSun and this scale is still in use.The intensity interferometer has a very poor signal-to-noise ratio compared to the classical "Michelson" stellar interferometer. Twiss decided to pursue the Michelson alternative at the National Physical Laboratory at
Teddington in the UK. John Davis worked with him for a short while on this project.When the
Royal Observatory, Edinburgh established its outstation atMonte Porzio Catone just south ofRome , Twiss decided to move his Michelson interferometer there. Not only was the weather more conducive to astronomy, the food and wine were much superior to what was available in Teddington!Speckle interferometry was discovered during that period by Antoine Labeyrie. This stimulated a renewed interest around the world in interferometry. In particular, John Davis and Hanbury Brown became convinced that a Michelson interferometer would be cheaper to build and have superior performance to a new intensity interferometer.
In the mid-1970s Twiss's non-scientific interests gradually took over and he effectively retired from active involvement in science.
In the 1970s he made it clear that he regarded
Australia as a colonial backwater. His reaction when told thatWilliam J. Tango was going to join Davis and Brown in Sydney was typical. "But William," he said, "they eat peas out of tins!"In spite of that, a few years before his death Twiss visited Australia and fell in love with it. In 2004 he applied for permanent residence. He died on 19 May 2005.
He is mentioned in the book "BOFFIN : A Personal Story of the Early Days of Radar, Radio Astronomy and Quantum Optics" ISBN 0-7503-0130-9, by Hanbury Brown
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