Experiment: Leslie Cube (230 V, 50/60 Hz)

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Objective: Measure the heat radiated by Leslie Cube

Heat exchange between a body and its surroundings occurs, among other things, by means of emission and absorption of radiated heat. The amount of heat radiated is dependent on the temperature of the body and the nature of its surface. This can be demonstrated with the help of Leslie’s cube. The compact equipment used in this experiment consists of an operating unit upon which a Leslie cube is placed and a holder for attaching a Moll thermopile. The cube can be rotated and has a built-in heating lamp as well as a built-in temperature sensor for controlling the heating of the surfaces such that they attain a temperature which can be adjusted to a set level. The side surfaces of the cube include one of polished metal, one matt surface, one painted white and one painted black. For each of these four surfaces, the voltage, which is proportional to the intensity of the radiation, is measured as a function of temperature. The apparatus is used to confirm the Stefan-Boltzmann law.