- a device for measuring minute amounts of radiant energy by determining the changes of resistance in an electric conductor caused by changes in its temperature.
Origin of bolometer
1880–85; < Greek bol(ḗ) ray + -o- + -meter
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for bolometer
A more careful study has been made by Langley and Very with the bolometer.
Later, Langley reinvestigated the radiation of Pyrophorus and could detect no heating whatever with the bolometer.
We have a heat-measuring instrument, the bolometer, which makes the best thermometer seem Early Victorian.The Outline of Science, Vol. 1 (of 4)
J. Arthur Thomson
They may be investigated with the bolometer, an instrument invented by the late Professor Langley.Astronomy of To-day
Cecil G. Dolmage
- a sensitive instrument for measuring radiant energy by the increase in the resistance of an electrical conductor
C19: from bol-, from Greek bolē ray of light, stroke, from ballein to throw + -meter
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012