Quick Answer:The Radiation Can Set is a pair of identical screw-cap metal cans, one smooth metal and one painted dull black, for showing that hot water cools at different rates depending on the surface, because of the thermal radiation each can emits.
Last updated: 19 October 2026
Key Features
Two identical-sized metal cans with screw caps.
One can has a smooth metal finish; the other is painted dull black.
Demonstrates how surface finish affects the cooling rate of hot water.
Activity guide included.
Technical Specifications
Specification
Value
Cans
Two, identical size, metal, screw cap
Surfaces
Smooth metal; dull black paint
Included
Activity guide
How It Is Used
Both cans are filled with hot water and left to cool while their temperatures are compared over time. The dull black can and the smooth metal can cool at different rates, showing students that heat loss by thermal radiation depends on the surface.
Frequently Asked Questions
What does the Radiation Can Set demonstrate?
The difference in cooling rates of hot water in a smooth metal can and a dull black can, which is attributed to the thermal radiation emitted by the two surfaces.
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