- Aluminium plate box - 10 cm sides
- Top opening fitted with a stopper
Includes: (1) Apparatus
Aluminium plate box with 10 cm sides. The vertical faces of the box are blackened, roughened, varnished and polished respectively. The top opening is fitted with a stopper. The apparatus is filled with water maintained at boiling point by a low bunsen flame Infrared sensors may be used to compare the relative radiant heat output from each of the four faces.
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