I was just thinking about how amazing rainbows are and how lucky we are that we can see them. But I was also wondering if other animals or hypothetical aliens that can see different spectra of light can also see something in the sky or is it just coincidentally just visible light?
In: Biology
Soon after diffraction was characterized, William Herschel asked the question whether light of different colors had different temperatures. He set up a prism to diffract the light, and as a control set up a thermometer to the side of the red light. To his surprise the “control” thermometer consistently showed a higher temperature than the rest of the room. He inadvertently discovered infrared light, though he didn’t know that at the time. Just that there were invisible rays coming from the light that carried heat.
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