Ritchie's experiment

Ritchie's experiment

[′rich·ēz ik‚sper·ə·mənt]
(thermodynamics)
An experiment that uses a Leslie cube and a differential air thermometer to demonstrate that the emissivity of a surface is proportional to its absorptivity.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.