RAS question
Aryabhata's contributions include:
Correct answer: (A) Value of pi, Earth's rotation, solar system, decimal place value system.
Aryabhata's contributions included the approximation of pi as 3.1416, the idea that the Earth rotates on its axis, scientific explanations of solar and lunar eclipses, and the use of the place-value system.
Explanation
Aryabhata was not merely an astronomer; the Aryabhatiya was a compact work of mathematics and astronomy. His contributions belonged to both sides of that work: in mathematics, he gave an approximation of pi as 3.1416 and used a place-value system; in astronomy, he described the Earth's daily rotation and explained solar and lunar eclipses through shadows rather than mythic causes. His work later influenced Arabic translation traditions and was used in the Islamic world and Europe. That breadth is exactly why a restrictive option such as only astronomy misses the point.
Why the other options are wrong
- (B) Aryabhata's work was not confined to astronomy, because his mathematical contributions included pi and the place-value system.
- (C) Medicine was not the field represented by these contributions; Aryabhata belonged to mathematics and astronomy.
- (D) Poetry was not the substance of these contributions, which concerned mathematical values, numerical systems, Earth's rotation and eclipses.
Concept
This tests the ancient Indian science and mathematics strand of the RAS history syllabus. Aryabhata recurs because he links Gupta-age intellectual history with astronomy, mathematics and later cross-cultural transmission.