▁College ▁in ▁V ad du k od da i . ▁P . ▁Kan agas ab ap ath y , ▁Head ▁of ▁the ▁Department ▁of ▁Mathemat ics ▁at ▁the ▁Per aden i ya ▁Camp us ▁of ▁the ▁University ▁of ▁Sri ▁L anka , ▁was ▁appointed ▁the ▁first ▁Dean ▁of ▁the ▁Fac ulty ▁of ▁Science . ▁The ▁fac ulty ▁initially ▁had ▁only ▁one ▁department : ▁Mathemat ics ▁and ▁Statistics . ▁ ▁The ▁Department ▁of ▁Chem istry ▁and ▁Department ▁of ▁Physics ▁were ▁started ▁in ▁April ▁ 1 9 7 5 . ▁ ▁The ▁facilities ▁at ▁J aff na ▁College ▁proved ▁to ▁be ▁in ade qu ate ▁and ▁construction ▁of ▁a ▁new ▁building ▁for ▁the ▁fac ulty ▁at ▁the ▁Th ir un el vel i ▁site ▁began ▁in ▁ 1 9 7 5 . ▁The ▁fac ulty ▁left ▁J aff na ▁College ▁and ▁moved ▁into ▁the ▁Natural ▁Science ▁Block ▁at ▁Th ir un el vel i ▁in ▁June ▁ 1 9 7 8 . ▁ ▁Three ▁Physics ▁Block ▁was ▁completed ▁in ▁September ▁ 1 9 8 0 , ▁Mathemat ics ▁and ▁Statistics ▁Block ▁in ▁ 1 9 8 5 ▁and ▁Chem istry ▁Block ▁in ▁ 1 9 8 8 . ▁The ▁Department ▁of ▁Computer ▁Science ▁was ▁started ▁in ▁ 1 9 9 1 . ▁The ▁Department ▁of ▁Fish eries ▁was ▁added ▁in ▁June ▁ 2 0 0 9 . ▁ ▁The ▁fac ulty ▁offers ▁under grad uate ▁courses ▁which ▁lead ▁to ▁Bach elor ▁of ▁Science ▁( B . Sc .) ▁degrees . ▁ ▁The ▁fac ulty ▁is