A bolometer is a device for measuring radiant heat by means of a material having a temperature-dependent electrical resistance.[1][2] It was invented in 1878 by the American astronomer Samuel Pierpont Langley.
- ^ "Langley's Bolometer, 1880-1890". Science Museum Group. Retrieved 20 March 2022.
- ^ See, for example, bolometers – Definition from the Merriam-Webster Online Dictionary