Question: What number, representing a dimensionless quantity, is named after the winner of the 1983 Nobel Prize for Physics
Sentence (from "Subrahmanyan Chandrasekhar"): Subrahmanyan Chandrasekhar, FRS (Tamil: சுப்பிரமணியன் சந்திரசேகர் ; ; 19 October 1910 – 21 August 1995), was an Indian American astrophysicist who was awarded the 1983 Nobel Prize for Physics with William A. Fowler "for his theoretical studies of the physical processes of importance to the structure and evolution of the stars".
Relevant evidence: Yes