Gravity Classes Your Search for Best IIT-JEE/AIEEE Coaching Ends Here....
AboutGravity Classes
Nurtured by two enterprising graduates of the Department of Chemical Engineering & Bio-Chemical Engineering, IIT Delhi, GRAVITY CLASSEScame into existence in January 2007.
Addition of transition metal compounds to glass give colored glasses. Small amounts of Cr(III), Mn(IV), Co(II) and Fe(III) compounds impart green, violet blue or brown color respectively