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fermatslibrary's profile
Fermat's Library
Fermat's Library
Fermat's Library
@fermatslibrary

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Fermat's Library

@fermatslibrary

A platform for illuminating academic papers. We publish an annotated paper every week. Our chrome extension for arXiv: https://fermatslibrary.com/librarian 

fermatslibrary.com
Joined September 2015

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    Fermat's Library‏ @fermatslibrary 24 Dec 2018
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    Infrared radiation was discovered by William Herschel in 1800. He used a prism to refract sunlight and held a thermometer just beyond the red end of the spectrum. This thermometer - meant to be a control to measure the room temperature - recorded the highest temperature of allpic.twitter.com/3dXxPW3nCy

    8:25 AM - 24 Dec 2018
    • 686 Retweets
    • 2,468 Likes
    • James thecalculuscism 卐 JaredCrue CMDR “Rebuy” Soantii 👨‍🚀 Rick Hunter 🚀 TomiTapio Bob nathan X
    19 replies 686 retweets 2,468 likes
      1. Tamás Görbe‏ @TamasGorbe 24 Dec 2018
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        Replying to @fermatslibrary

        Here's the reason behind it. https://physics.stackexchange.com/questions/228508/why-does-william-herschels-experiment-show-red-light-as-warmer-than-blue … (My previous answer was wrong.)

        0 replies 4 retweets 10 likes
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      1. Caly‏ @Calybium 24 Dec 2018
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        Replying to @fermatslibrary

        Wiliam Herschel commenting on this experimentpic.twitter.com/z5F5te9NXs

        0 replies 0 retweets 24 likes
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      1. New conversation
      2. borilla‏ @borillanabisso 24 Dec 2018
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        Replying to @fermatslibrary

        Why did he need to record room temperature? What was the original experiment?

        4 replies 1 retweet 1 like
      3. David Keenleyside‏ @Nuke_Bloodaxe 24 Dec 2018
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        Replying to @borillanabisso @fermatslibrary

        Logically, measuring room temperature will allow you to determine the difference in temperature for the other colours. Therefore, it is likely that he wanted to know which colours carry what level of energy (heat in this case.). I'm using a technique called inference here.

        1 reply 0 retweets 13 likes
      4. 1 more reply
      1. Pankaj Thapliyal‏ @PankajT04765688 24 Dec 2018
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        Replying to @fermatslibrary

        Pankaj Thapliyal Retweeted Fermat's Library

        Well, A true Genius Lies in Innovation.https://twitter.com/fermatslibrary/status/1077238853520556035?s=19 …

        Pankaj Thapliyal added,

        Fermat's Library @fermatslibrary
        Infrared radiation was discovered by William Herschel in 1800. He used a prism to refract sunlight and held a thermometer just beyond the red end of the spectrum. This thermometer - meant to be a control to measure the room temperature - recorded the highest temperature of all pic.twitter.com/3dXxPW3nCy
        0 replies 1 retweet 1 like
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      1. New conversation
      2. Phúc Lê‏ @lkhphuc 24 Dec 2018
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        Replying to @fermatslibrary

        IIRC, in the new A Spacetime Odyssey, @neiltyson told Newton discovered infrared light like this.

        1 reply 0 retweets 1 like
      3. muhaimin blank‏ @muhaimin_yunusa 24 Dec 2018
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        Replying to @lkhphuc @fermatslibrary @neiltyson

        Newton almost did. It later went on that William Herschel did.

        0 replies 0 retweets 2 likes
      4. End of conversation
      1. New conversation
      2. Uvula King‏ @tonyver45 25 Dec 2018
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        Replying to @gabridli @fermatslibrary @criscas74

        No overt idea, but I would guess it was someone from roughly the same era as Herschel. Perhaps the intense interest in optics for telescopes at the time played a part.

        0 replies 0 retweets 2 likes
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      2. Roger Sauer‏ @rsauer3473 24 Dec 2018
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        Replying to @fermatslibrary

        Similarly, Khaar Jesnit of Bangalore (1603-68) discovered something akin to ultraviolet light by sunbathing next to the Ganges wearing little more than a loincloth and walnut shells to protect his eyes. Severely burned he used his chemistry skills to manufacture Coppertone.

        1 reply 0 retweets 3 likes
      3. Sitesh Srivastava‏ @smartsitesh 25 Dec 2018
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        Replying to @rsauer3473 @fermatslibrary

        Hi Any link to Khaar Jesnit??? Strange that neither Google nor Bing threw any clue on this !!!!

        0 replies 0 retweets 0 likes
      4. End of conversation

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