Leslie's Cube, Copper, 100mm Sides

This Leslie's Cube is a copper cube measuring approximately 100mm on each side, with four different surface finishes: dull black, bright black, white, and bright (polished). The cube is filled with hot water and used to demonstrate that surfaces with different colors and textures emit thermal radiation at different rates. By measuring the infrared radiation from each face at the same temperature, students observe that dark, matte surfaces emit more radiation than light, polished surfaces. The copper construction provides rapid, uniform heat distribution throughout the cube.