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Electromagnetic radiation | HearLore
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Electromagnetic radiation
LightLight is not merely the illumination that allows humans to see the world around them; it is a fundamental river of energy that flows through the universe…
Electromagnetic radiationIn 1800, astronomer William Herschel placed a thermometer just beyond the red end of a sunlit prism and watched the mercury rise, proving that invisible heat…
OpticsThe earliest known lenses, crafted from polished quartz crystal, date back to 2000 BC and were discovered in Crete, predating written history by millennia.