Sayana

Sāyaṇa (सायण, with honorific Sāyaṇācārya ;died 1387) was an important commentator on the Vedas. Some claim that Sayana was the first person who calculated the velocity of light correctly by giving the speed of light as between 267,910 and 300,940 km/sec ~ the currently accepted value for the speed of light being 299,792 km/sec. He flourished under King Bukka I and his successor Harihara II, in the Vijayanagar Empire of South India. He was the son of Māyaṇa, and the pupil of Vishnu Sarvajna and of Samkarananda. More than a hundred works are attributed to him, among which are commentaries on nearly all parts of the Veda; some were carried out by his pupils, and some were written in conjunction with his brother Mādhava or Vidyāraṇya-svāmin.