School of Physics Lecture Demonstration Manual

Hc-6 Leslie's Cube

Published: Monday 13 March 2006 - Updated: Monday 28 March 2011


To compare the heat radiation from a black and shiny surface.



Click on pictures to enlarge.

Leslie's Cube Photo

Leslie's Cube Diagram


Two versions are available. A brass container coated on half of one surface with a matte black paint and highly polished on the other. Hot water is placed inside the cube and each surface presented in turn, at the same distance to a thermopile. Alternatively, PASCO'S Apparatus consists of a cube internally heated by a temperature controlled light globe with black, white, shiny and matte surfaces. Leslies cube may be placed on a turntable so that alternate faces emit radiation to a sensor. The experiment shows that the radiant heat is greater from the black surface.

Safety notes

Electrical safety 

Fire/Burn Safety 


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