Specifications: This model is for the study of how effective light energy is absorbed through a white and black object by touching it with user?s right and left palm. This model has a cylindrical structure and has a diameter of 55 cm and is 184cm in height. The inner layer has a black or blue slot. This model is installed with a one white/black palm-shaped object. It is attached with 2 light bulbs. The structure is covered with Formica plastic.