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Finding the hot spot: incorporating thermal imagery into our whale research – Geospatial Ecology of Marine Megafauna Laboratory
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File:Glass prism, mounted at end of a brass tube, used by Sir William Herschel 10287820 H.jpg - Wikimedia Commons
![In1800, Herschel was testing filters for the sun so he could observe sun spots. When using a red filter he found there was a lot of heat produced. He discovered infrared radiation In1800, Herschel was testing filters for the sun so he could observe sun spots. When using a red filter he found there was a lot of heat produced. He discovered infrared radiation](https://c8.alamy.com/comp/G14X76/in1800-herschel-was-testing-filters-for-the-sun-so-he-could-observe-G14X76.jpg)
In1800, Herschel was testing filters for the sun so he could observe sun spots. When using a red filter he found there was a lot of heat produced. He discovered infrared radiation
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temperature - Why does William Herschel's experiment show red light as warmer than blue? - Physics Stack Exchange
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