bolometer

[ boh-lom-i-ter, buh- ]

Phonetic (Standard)IPA

noun

, Physics.

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.

bolometer

/ bəʊˈlɒmɪtə; ˌbəʊləˈmɛtrɪk /

a sensitive instrument for measuring radiant energy by the increase in the resistance of an electrical conductor

1880–85; < Greek bol ( ḗ ) ray + -o- + -meter

C19: from bol- , from Greek bolē ray of light, stroke, from ballein to throw + -meter

They may be investigated with the bolometer, an instrument invented by the late Professor Langley.

A more careful study has been made by Langley and Very with the bolometer.

We have a heat-measuring instrument, the bolometer, which makes the best thermometer seem Early Victorian.

Later, Langley reinvestigated the radiation of Pyrophorus and could detect no heating whatever with the bolometer.

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