BIRBAL SAHNI

BIRBAL SAHNI WAS A FAMOUS PALAEOBOTANIST.PALAEOBOTANY IS A MIX OF BOTANY AND GEOLOGY.HE DISCOVERED A NEW GROUP OF FOSSIL GYMNOSPERMS CALLED PENTOXYLEAE WHICH MADE HIM WORLD FAMOUS.SOME OF HIS STUDIES HAVE EVEN GIVEN SUPPORT TO THE CONTINENTAL DRIFT THEORY.

BRAHMA GUPTA

EVEN THOUGH THE CONCEPT OF ZERO WAS KNOWN EARLIER, IT WAS BRAHMA GUPTA WHO FIRST FRAMED RULES OF OPERATIONS WITH ZERO SYSTEMATICALLY.HE IS CONSIDERED TO BE THE FATHER OF THE BRANCH 'NUMERICAL ANALYSIS'.HE TREATED ARITHMATICS AND ALGEBRA AS SEPARATE BRANCHES.HE CRITICIZED ARYABHATTA WHO SAID THAT EARTH WAS NOT SATTIONARY.

C K N PATEL

CARBON DIOXIDE LASER WAS DEVELOPED BY C K N PATEL, NOW THE DIRECTOR OF AT&T BELL LABORATORIES IN USA.CARBON DIOXIDE LASER LASER LIGHT IS INVISIBLE AND LIES IN THE INFRARED REGION.IT CAN BE USED FOR LIDAR AND TO DETECT AIR POLLUTION.

BHASKARA2

DTERMINATION OF ARC AND VOLUME OF SPHERE USING INTEGRAL CALCULUS WAS MENTIONED FOR THE FIRST TIME BY BHASKARA ALONG WITH IMPORTANT FORMULAE AND THEOREMS IN TRIGONOMETRY AND PERMUTATION AND COMBINATION.HE HAD GIVEN AN EXAMPLE WHAT IS NOW CALLED DIFFERENTIAL COEFFICIENT AND ALSO ROLLES THEOREM.

C R RAO

C R RAO IS A RENOWNED STATISTICIAN.HE BECAME FAMOUS WHEN HE PUT FORWARD 'THE THEORY OF ESTIMATION'.HE MAPPED CHROMOSOMES IN MICE USING THE TECHNIQUE OF STATISTICS.HIS BOOK 'LINEAR STATISTICAL INFERENCE AND ITS APPLICATIONS' HAS BEEN TRANSLATED INTO SEVERAL LANGUAGES.