Leslie'S Cube/Leslie Cube

suitable for KS3+. Tinplate box with 130mm sides. The top opening is of 7.5mm diameter and is fitted with a lid. The apparatus is filled with water maintained at boiling point by a low bunsen flame. Infra-red sensors may be used to compare the relative radiant heat output from each of the four faces which are, respectively, blackened, roughened, varnished and polished. Stopper is supplied (7mm bottom dia. 12mm top dia).