Useful for qualitative experiments in thermal radiation. The results can also be quantified using a suitable radiation sensor facilitating investigating of radiation from different surfaces at a single temperature or radiation from a single surface at different temperatures (Stefan-Boltzman’s Law). Comprises a sheet metal cube of sides about 130mm with opening at the top, for pouring in water and inserting a thermometer through a holed rubber stopper. One each of the four vertical faces is finished black, varnished, roughened and polished.
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