The origin of light will be explained through a number of experiments, including some explosive chemical reactions, during the Saturday, March 23, ÃÛÌÇÖ±²¥ Wizards show "The Chemistry of Light." Kathy Rowlen, a chemistry and biochemistry professor at the University of ÃÛÌÇÖ±²¥ at Boulder, will present the show at 9:30 a.m. in Cristol Chemistry and Biochemistry, room 140.