Question: What equation is this Indian astrophysicist who founded Indian Physical Society best known for?
Sentence (from "Meghnad Saha"): Meghnad Saha FRS (6 October 1893 – 16 February 1956) was an Indian astrophysicist best known for his development of the Saha ionization equation, used to describe chemical and physical conditions in stars.
Relevant evidence: Yes