Question: What equation is this Indian astrophysicist who founded Indian Physical Society best known for?
Sentence (from "Indian Physical Society"): The society's stated objectives are to promote the progress and uphold the cause of both pure and applied physics in India, to encourage publications in physics and related areas, to publisher books, journals, proceedings etc., to organize conferences, advise government bodies, and to secure and administer funds, grants and endowments for the furtherance of scientific research.
Relevant evidence: No