Physics a very sensitive instrument for measuring and recording the intensity of small amounts of radiant energy
Origin of bolometer; from Classical Greek bol?, ray, literally , something thrown ; from ballein, to throw (see ball) + -meter
An instrument that measures radiant energy by correlating the radiation-induced change in electrical resistance of a blackened metal foil with the amount of radiation absorbed.
Origin of bolometerGreek bol&emacron;, ray; see gwel&schwa;- in Indo-European roots + –meter.
- (physics) A sensitive device for detecting and measuring the energy of electromagnetic radiation.
bolo- + -meter