The scientific concepts of light, polarization and optics will be explained through a number of experiments, including creating a giant soap bubble, during the April 15 CU Wizards show "Light, Polarization and Liquid Crystals." University of Colorado at Boulder physics Professor Noel Clark and chemistry Professor David Walba will present the show at 9:30 a.m. in Duane Physics room G1B30. The show, aimed primarily at students in grades five through nine, is free and open to the public.