![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/c/c5/JPL_Spiderweb_Bolometer.jpg/640px-JPL_Spiderweb_Bolometer.jpg&w=640&q=50)
Bolometer
Device for measuring incident electromagnetic radiation / From Wikipedia, the free encyclopedia
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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.
![Image of spiderweb bolometer for measurements of the cosmic microwave background radiation.](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c5/JPL_Spiderweb_Bolometer.jpg/320px-JPL_Spiderweb_Bolometer.jpg)