Quick Answer:The Leslie Cube 100mm sides is a copper plate box with 100 mm sides whose four faces are blackened, roughened, varnished and polished, used to compare radiant heat output. Its 15 mm top opening has a stopper.
Last updated: 18 October 2026
Key Features
Copper plate box with 100 mm sides.
Four faces finished blackened, roughened, varnished and polished.
15 mm diameter opening with stopper.
Filled with water kept at boiling point by a low Bunsen flame.
Technical Specifications
Specification
Value
Material
Copper plate
Side length
100 mm
Filling opening
15 mm diameter, with stopper
Face finishes
Blackened, roughened, varnished, polished
How It Is Used
The cube is filled with water and kept boiling over a low Bunsen flame, and an infra-red sensor is held at the same distance from each face to compare how much heat each surface radiates.
Frequently Asked Questions
How are the four faces of the Leslie Cube 100mm sides finished?
They are blackened, roughened, varnished and polished respectively, so the radiant heat output from each can be compared.
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