Multiple choice general knowledge science & technology

Infra-red rays were first detected by ?

  1. Herschel

  2. Rayleigh

  3. Huygens

  4. Maxwell
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A Correct answer
Explanation

William Herschel discovered infrared radiation in 1800 when he used a prism to split sunlight and found that a thermometer just beyond the red spectrum showed the highest temperature. This led to the discovery of invisible infrared rays.

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