Lochlainn O'Raifeartaigh ( ; 11 March 1933 – 18 November 2000) was an Irish physicist in the field of theoretical particle physics.
 He is best known for the O'Raifeartaigh Theorem, a result in unification theory, and the O'Raifeartaigh Model of supersymmetry breaking.
Edward Hutchinson Synge (1 June 1890 – 26 May 1957) was an Irish physicist who published a complete theoretical description of the near-field scanning optical microscope, an instrument used in nanotechnology, several decades before it was experimentally developed.
 He never completed university yet did significant original research in both microscopy and telescopy.
 He was the first to apply the principle of scanning in imaging, which later became important in a wide range of technologies including television, radar, and scanning electron microscopy.
 He was the older brother of distinguished mathematician and theoretical physicist John Lighton Synge.
Edmund Edward Fournier d'Albe (born 1868; died 29 June 1933 at St. Albans, UK) was an Irish physicist, astrophysicist and chemist.
 He was a university professor and distinguished himself in the study and popularization of electromagnetism, as well as the beginnings of astrophysics.
 He also experimented with improving radio and television.
Joly is an impact crater on Mars, located at 74.7°S latitude and 42.7°W longitude in the Mare Australe quadrangle.
 It measures 79.9 kilometers in diameter and was named after Irish physicist John Joly (1857–1933).
 The name was approved in 1973, by the International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN).
Tyndall is an impact crater in the Cebrenia quadrangle of Mars, located at 40.0°N latitude and 190.1°W longitude.
 It measures approximately 87 kilometers in diameter and was named after Irish physicist John Tyndall (1820–1893).
 The name was approved in 1973, by the International Astronomical Union (IAU) Working Group for Planetary System Nomenclature.
Professor Patrick Joseph Nolan (11 August 1894 – 28 December 1984) was an Irish physicist.
 Like his older brother, physicist John James Nolan, he specialised in atmospheric physics.
 In 1971, he was awarded the Boyle Medal by the Royal Dublin Society.
Bell's theorem is a "no-go theorem" that draws an important distinction between quantum mechanics (QM) and the world as described by classical mechanics.
 This theorem is named after John Stewart Bell.
John Stewart Bell FRS (28 June 1928 – 1 October 1990) was a Northern Irish physicist, and the originator of Bell's theorem, an important theorem in quantum physics regarding hidden variable theories.
Cormac O’Raifeartaigh (Cormac O’Rafferty) is an Irish physicist based at Waterford Institute of Technology in Ireland.
 A solid-state physicist by training, he is best known for several contributions to the study of the history and philosophy of 20th century science, including the discovery that Albert Einstein once attempted a steady-state model of the expanding universe, many years before Fred Hoyle
A sensitive flame is a gas flame which under suitable adjustment of pressure resonates readily with sounds or air vibrations in the vicinity.
 Noticed by both the American scientist John LeConte and the English physicist William Fletcher Barrett, they recorded the effect that a shrill note had upon a gas flame issuing from a tapering jet.
 The phenomenon caught the attention of the Irish physicist John Tyndall who gave a lecture on the process to the Royal Institution in January 1867.

Question: When was the Irish physicist died from who's name the Bell's theorem was named?
Answer: 1 October 1990