History of the Light Bulb 1705 to 1809

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  • Опубліковано 1 жов 2024

КОМЕНТАРІ • 169

  • @LouisHansell
    @LouisHansell 2 роки тому +5

    You are quite correct, In the mid-18th century most people thought that churches were burning down because God was showing his displeasure with the congregation. Franklin thought it was because the churches, with their spires, were usually the highest buildings in their locals and that lightning, not the Almighty, was causing the fire.
    Franklin installed his lightning rod in the steeple of Christ's Church at 2nd and Market in Philadelphia. You can still visit that historic church today in Olde City Philadelphia.

  • @remcogreve7982
    @remcogreve7982 2 роки тому +5

    Leiden is not in Denmark.

  • @Evergorn
    @Evergorn 3 роки тому +7

    Love your in depth stories about these topics.
    5:35 Leiden (Leyden jar) is not in Denmark though but in my home country the Netherlands.

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  3 роки тому +7

      I am so sorry. I accidentally said that Leiden was in Germany in my Leyden jar video and I was determined to not mess it up again and then... I messed it up again! I apologize - don’t know where my brain is. Thank you for correcting me.

  • @Simonjose7258
    @Simonjose7258 3 роки тому +11

    Wow! My mind is always blown. 🤯 Once again I learned the answers to many of my questions. I always wondered how they even came up with stuff in the first place!? That glowing barometer and the giant battery in the basement that helped them discover a bunch of new elements! Wow. Thank you so much. 🙏👏👏👏✌

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  3 роки тому +6

      I love Humphry Davy and I love Faraday. I might be the only one but they are both amazing

  • @freshbits5585
    @freshbits5585 3 роки тому +10

    I wanted to say thank you for these wonderful videos you've been posting. It's a shame that your audience is not bigger than it is, your content and presentation is great and definitely deserves a much larger audience. But I hope you continue to make these wonderful videos!!

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  3 роки тому +5

      Thank you so much for the lovely comment. I’m not stressing about my viewers they will come in time.

    • @freshbits5585
      @freshbits5585 3 роки тому +1

      @@Kathy_Loves_Physics Happy to hear that. Keep up the good work!

  • @jazzdirt
    @jazzdirt 2 роки тому +1

    "... who got bored with rubbing tubes by hand." Georg... Georg.. Georg... ;P
    Pieter van Muschenbroek was a Dutch man, from Leiden. Between Amsterdam and Den Haag.

  • @RANDALLOLOGY
    @RANDALLOLOGY 2 роки тому +1

    That was electrifying. LOL 😸

  • @elonmask50
    @elonmask50 2 роки тому +2

    A truly brilliant (pun intended), presentation, I never knew how much I never knew, but now I know all thanks to you.

  • @JBernhard72
    @JBernhard72 Рік тому +1

    A thumbs up just for the James Burke reference!

  • @pixxelwizzard
    @pixxelwizzard 3 роки тому +5

    Great video! You covered a lot of ground with this one, and I really enjoyed it. That BBC documentary is fantastic and I highly recommend it. I wasn't aware it had any factual inaccuracies, but it's still worth a watch. Dr. Jim is one of my favorite science personalities and watching him duplicate many of these experiments on camera was delightful, and it reminded me of your channel!

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  3 роки тому +5

      I thought his video was beyond beautiful and I love seeing all the experiments and his presentation was great but I think I’m like a lawyer watching Low and Order on tv, I keep on yelling objection! That video in particular had a lot of inaccuracies in my view (for example, Gray did not electrify his flying boy with an electricity machine, he electrified him with a charge tube and the electrified boy was the demonstration of his theories of electrical conduction not the reason he came up with a series of electric conduction) and it drove me nuts.

  • @mikemyers3387
    @mikemyers3387 Рік тому +1

    You had me with the James Burke shout out! Your enthusiasm is infectious.

  • @deepcut7788
    @deepcut7788 3 роки тому +2

    Thank you so much for making this channel, I just found it and I'm loving it so much, learning about the history of the people behind the science makes it easier to understand the science better, interestingly.

  • @shawnmulberry774
    @shawnmulberry774 3 роки тому +7

    Well done as usual. James Burke would be pleased.

  • @campkohler9131
    @campkohler9131 Рік тому +1

    All of the illuminators prior to LEDs had some major room for improvement. Have we now reached a level of perfection such that there will no need for new sources? The appearance of addressable LEDs allows for nifty new applications opened to amateur designers, but even these are not major improvements to the basic technology. So have we reached the final lighting plateau, or will there be electric wall paint, addressible drywall, glowing porcelain fixtures, piezoelectric chewing gum and other wonders to supplant the LED?

    • @Muonium1
      @Muonium1 Рік тому

      the ultimate efficiency limit has not yet been reached. laser based illumination systems for instance have the ability to supersede LEDs in efficiency and intensity, as is presently seen on a few high end luxury car headlights. Beyond this in the far future, laser based high harmonic supercontinuum generation sources may ultimately become the dominant technology, but beyond a time horizon of a few decades it's impossible to say what light technology could become. What is certain is that the stupendous increases of efficiency and affordability of creating artificial light (over a factor of a million since the days of the oil lamp in antiquity. see William Nordhaus - The Cost Of Light) will undoubtedly continue for some time to come.

  • @ruanlslima
    @ruanlslima 3 роки тому +5

    geez, I'm totally buying your book, Kathy! I'm huge fan of your work! History of science clears up so many gaps in conceptual understanding, I'm amazed.

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  3 роки тому +2

      Great! Now I just have to finish the darn thing.

    • @robertakerman3570
      @robertakerman3570 2 роки тому

      @@Kathy_Loves_Physics Your seminars are always "energizing".

    • @TheNoiseySpectator
      @TheNoiseySpectator 2 роки тому

      @@Kathy_Loves_Physics I am sure since then you have gotten a lot of time locked up in your home with nothing else to do....
      And, I you have said that you've been through a few weeks when you were too sick to get out of bed. ✍️📖

  • @justinahole336
    @justinahole336 2 роки тому +1

    Heck! You get a "like" for the James Burk reference! Loved his stuff!

  • @jonwatkins254
    @jonwatkins254 3 роки тому +3

    Excellent video chock full of information. Very nice to have the date in the corner of the frame.

  • @moreliaboy
    @moreliaboy 3 роки тому +1

    Kathy Loves Physics! Where have you been all my life? Your Chanel is simply amazing. I am fascinated with the History of Science esp. all things Physics. Thanks for all your expertise and amazing arsenal of factoids that bring it so alive. I would LOVE to see a video of you walking us through how you make a video. Where do you find all the actual Scientific papers! Simply fabulous!

  • @MichaelJamesSeattle
    @MichaelJamesSeattle 2 роки тому +3

    It is quite helpful to me that you put the years of the events you're discussing in the corner of the screen. Thanks for the informative video!

    • @jamesslick4790
      @jamesslick4790 2 роки тому

      Yeah, I liked that. Helped me keep track of the time line while listening to all of the other facts.

  • @copernicofelinis
    @copernicofelinis 3 роки тому +6

    Love to see the videos of the actual experiments. It raises the informative and educative value exponentially.

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  3 роки тому +5

      Thanks, this one was fun as I could include so many, next one? not so much.

    • @SiliconSoup
      @SiliconSoup 2 роки тому

      Hi Copernico, maybe you are the reason I'm recommended this channel. Super great channel, I like it.

    • @copernicofelinis
      @copernicofelinis 2 роки тому

      @@SiliconSoup YT recommendations work in mysterious (and often mischievous) ways.
      Yeah, I like this channel as well. You can tell she does his homeworks from the list of references she digs up with every video.

  • @joop2295
    @joop2295 2 роки тому +1

    Your videos on electricity & history are absolutely great!
    However, your geography skills could use a little improvement. 😉
    Pieter van Musschenbroek was a Dutchman (like me) from the Dutch city of Leyden (nowadays Leiden).

    • @Frans_van-den-Berg
      @Frans_van-den-Berg 2 роки тому

      Typical North American she is, Leyden, we spell it Leiden, is neither in Germany nor Denmark but in The Netherlands aka Holland.

  • @mikepasko7493
    @mikepasko7493 2 роки тому

    Very good information....I enjoyed very much when you were rubbing that rod ...you did such a great job on it...it got me.............😜😜😜

  • @DrBFromEarth
    @DrBFromEarth 5 місяців тому

    You're just an awesome human being. Always a pleasure watching your videos.

  • @chriscockrell9495
    @chriscockrell9495 4 місяці тому

    1705 - Haukesbee's generator made purple light.
    Inspired by a barometer. Flourencent light
    1734 - Du Fay insulators
    1737 - Bose - spark lighting alcohol on fire.
    1741 - Nollet - electric egg
    1746 - Leydon Jar
    1747 - Franklin makes haukebe machine with brush. Incandescence.
    1750 52 - lightning rod

  • @richtomlinson7090
    @richtomlinson7090 Рік тому +1

    These other clips of you doing experiments with family or friends, shows me that you would be a fun teacher.
    I'm close to your age, and my late father would bring science home from his job at the research and development center at GE.

  • @JamesFSmith-cb9lz
    @JamesFSmith-cb9lz 2 роки тому +2

    Love your videos. Plan to watch them all! Thanks for sharing all this interesting knowledge and wisdom.
    I'd love to see a time travel television show that uses your stories to recreate the actual events in scientific history!

  • @edgewood99
    @edgewood99 Рік тому

    Leiden in the NETHERLANDS...not Denmark.

  • @josephrapoza6453
    @josephrapoza6453 Рік тому

    Kathy your work is incredible and you have done your homework. Very interesting. Great great job.

  • @mikefirth9654
    @mikefirth9654 2 роки тому

    Can the title be changed? It clearly ends at 1809, not 1909, and the antiqueness of 1705 to 1809 against 'light bulb' would be more clickbaitish

  • @TheNoiseySpectator
    @TheNoiseySpectator 2 роки тому

    9:40
    Is interesting. Had she been allowed to continue her research and combine it with Davy's work on giant batteries, (Aka "capacitors") then
    Today we might be harvesting voltage out of storm clouds, for use as a domestic utility, instead of just producing it at power plants. 🤔
    (Note I said "just").

  • @tomsayen9295
    @tomsayen9295 Рік тому +1

    Thank you! So much information I never knew about. You are a great presenter!

  • @Muonium1
    @Muonium1 Рік тому

    I had no idea Franklin discovered (albeit very fleeting) electrically induced incandescence. I am continually stunned (shocked? 😁) at how often historical scientific discoveries were repeated and forgotten over and over again, with no telling which rediscovery would ultimately 'stick' and become the one cited as THE discovery moment in history books.

  • @dedrakuhn6103
    @dedrakuhn6103 Рік тому +1

    Nice video

  • @bicivelo
    @bicivelo Рік тому +1

    Fantastic video. So much content in a short span. I love electricity! 😊

  • @ikvanachter6002
    @ikvanachter6002 Рік тому

    Knowing history and A Nice, goodlooking woman. What do you really need more? Ah 3 phase 400 V 63 A to charge thé electric car perhaps?

  • @amitpatil5151
    @amitpatil5151 3 роки тому

    Hi Kathy Madam
    Happy to See you back again.
    Good Hairstyle.

  • @xtalplanet
    @xtalplanet 2 роки тому

    your expression is getting better and better from episode to episode, great maam

  • @ShazzPotz
    @ShazzPotz 2 роки тому

    You really should change the title of this video to "Early Electricity 1705 to 1809". You don't even mention the electric light bulb once within this video. Your title is kinda clickbait. I only watched this video to hear your take on the priority war for the invention of the light bulb - you know, the whole Edison vs Swan vs the other guys thing.

  • @lucasrem1870
    @lucasrem1870 2 роки тому

    i have used this 'Newton machine', in Haarlem, Tyler museum, we still have it, the original Lyden jar too.

  • @mourenonotario9278
    @mourenonotario9278 Рік тому

    Thank you for this early days of electrical experiments lection. We miss many of those experiments in our regular education program.

  • @pietervermeer5510
    @pietervermeer5510 Рік тому

    Pieter van Musschenbroeck was a Dutch physicist from Leiden and professor at Leiden University. Leiden is a town in the Netherlands. Not Denmark. If the rest of the research is also so well researched I doubt the value of these videos.

  • @mjouwbuis
    @mjouwbuis 2 роки тому

    So the town of Leyden spontaneously moved from Germany to Denmark now? Or the other way around, Im not sure of the date on the other video... It's located in The Netherlands, by the way.

  • @richtomlinson7090
    @richtomlinson7090 Рік тому

    This video at 10.30 mentions the movement of dead 🐸 frogs, and it reminded me of a story my late mother had.
    My mother was in a class with a girl that was sort of a local celebrity, because she had made it on the cover of LIFE magazine back in the 40s and the other students rigged her dissected frog to move without her doing anything, and this girl was mortified to see it seem to come to life, but she wasn't in control of it.
    Everyone else got a laugh.

  • @ElnaVD
    @ElnaVD 2 роки тому

    Mussenbroeck was A Dutchman and Leyden a town in Holland

  • @yuvrajcharan5387
    @yuvrajcharan5387 7 місяців тому

    I can see the amount of research you have done to make this video really logical thanks for making this love from 🇮🇳

  • @TRAVELWP
    @TRAVELWP 2 роки тому

    I love these videos ! I'm learning much !

  • @quinto3969
    @quinto3969 2 роки тому

    Kathy, you must be of Mediterranean descent. God, I hope so?!

  • @Tom-hk6ub
    @Tom-hk6ub 2 роки тому

    Please Please Please get a better mic and work on your audio. Thank you .

  • @jamest.5001
    @jamest.5001 2 роки тому

    They should have just went straight to the diode! The light emitting diode! It would saved alot of time! 🤥 ,😊

  • @FrankCoffman
    @FrankCoffman 2 роки тому

    love her talks

  • @peterlosangelos4108
    @peterlosangelos4108 2 роки тому

    video title 1909. while title page in video says 1809

  • @lacuentadevideos
    @lacuentadevideos Рік тому

    is that light in the gold leaf really incandescence? means it gets hot enough to emit light? its hard to imagine for me that such a good conductor would heat up with such a little asn short burst of energy, may be it is so thin, is it? I´d dare to say it is not heat involved here but sort of a gas discharge like exiting electrons to go up and down in such thin layer of atoms

  • @AllElectronicsGr
    @AllElectronicsGr 2 роки тому +1

    Your content is amazing !!!!

  • @rks515skr
    @rks515skr 2 роки тому

    Seems the old scientists are very similar to our current scientists (some of them).

  • @pietervermeer5510
    @pietervermeer5510 Рік тому

    The Leiden jar (Leidse fles) is also from Leiden from the Netherlands.

  • @billschiller6649
    @billschiller6649 2 роки тому

    James Burke style. Keep up the good work!

  • @svocud3650
    @svocud3650 2 роки тому +1

    Bravo, great video, Kathy, your enthusiasm is contageous! Only: Leyden (called Leiden
    nowadays), is a city in the Netherlands, not Denmark.

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  2 роки тому

      I’m sorry about that I think I made that mistake twice. Don’t know why I did that.

    • @TheNoiseySpectator
      @TheNoiseySpectator 2 роки тому

      @@Kathy_Loves_Physics I know this video is a year old now, but I have a question about 8:55.
      I don't understand what you mean?
      Surely you are not saying that the experiment drew _no charge_ out of the storm cloud?
      If not, then can you repeat where it _did_ come from?

    • @TheNoiseySpectator
      @TheNoiseySpectator 2 роки тому

      @Cv_Ocud - BTW, could Leiden have belonged to Norway at some times in the past and to the Netherlands, at other times?
      I'm asking you both.

    • @HugoHabicht12
      @HugoHabicht12 Рік тому +1

      @@TheNoiseySpectator nope, the Netherlands was never owned by Norway, once it was owned by Spain

    • @TheNoiseySpectator
      @TheNoiseySpectator Рік тому

      @@HugoHabicht12 Ah. 💡
      I appreciate the answer. ☺️
      I have since forgotten what made me wonder about that, but I do appreciate the answer. 😟

  • @notthatdonald1385
    @notthatdonald1385 2 роки тому

    Oh that poor dead frog twitching away. LOL

  • @jeromehugh9624
    @jeromehugh9624 3 роки тому +1

    Great video. Request you to talk a little closer to the microphone and louder.

    • @dahawk8574
      @dahawk8574 3 роки тому

      I had this very same feedback for Kathy.
      The professional solution is a lapel mic.
      Or a boom mount, if she didn't want to spend $40 on a Lavalier.

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  3 роки тому +1

      I actually have a lapel mic but it was hidden under my shirt and I think I hid it too far away from my mouth. I will try to do better with the sound sorry

    • @dahawk8574
      @dahawk8574 3 роки тому

      @@Kathy_Loves_Physics, you are one of my favorite UA-camrs. I would love your videos even if you spoke into a tin can.

  • @tyharness2527
    @tyharness2527 3 роки тому +1

    isaac newton's assistant - that was a tough gig i bet.

  • @Archiekunst
    @Archiekunst 2 роки тому

    Georg Matthias Bose's relative, Heinrich Bose, used to host Johann Sebastian Bach often and was godfather to his children. Today the Bose house is the Bach museum in Leipzig.

  • @josephrapoza6453
    @josephrapoza6453 Рік тому

    I am off to your next video.. AGAIN GREAT JOB. Incredible work.

  • @raullcalzadilla3541
    @raullcalzadilla3541 2 роки тому

    What a delight you are! Thank you.

  • @yogikarl
    @yogikarl Рік тому

    Thumbnail 1809 text 1909 ??????

  • @saikumardeekonda8789
    @saikumardeekonda8789 3 роки тому

    Hi madam I'm from India thanks for you and vdo

  • @lordmechanic
    @lordmechanic 3 роки тому +1

    I knew you were awesome before Kathy but watching you start fires on the stove...oh my! ;) Love your vids!

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  3 роки тому +2

      I think I should find a way to sneak that clip into every single video and make even if it’s about quantum mechanics or the laws of thermodynamics or radio history. I should just always have me lighting alcohol on fire!

  • @upendraagnihotri2686
    @upendraagnihotri2686 2 роки тому

    Maam love you respect you ...I did my graduation in science in 1997 but never got my doubt cleared...contextual study which i was desperately looking since ages and here in this channel i got what i was looking for and got my perspective clear. People in India need to get beyond rote learning to transform from developing country to developed country.Thanks for the great service.

  • @jnbfrancisco
    @jnbfrancisco 2 роки тому

    Kathy. I have noticed that when I pull the protective cover of my nasal strips in the dark, a blue light is produced at the point of separation. What's up with that?

    • @clarencegreen3071
      @clarencegreen3071 2 роки тому

      It's a phenomenon known as triboluminescence. It is shown in several videos here on YT.
      Back in the day when pictures came from film, I noticed that the end of the film was always exposed (to light) and appeared dark when developed. I found out later that the exposure came from light produced when I removed the tape that secured the end of the film to the roller on which it was wound. Fun times, back then!

  • @saikumardeekonda8789
    @saikumardeekonda8789 3 роки тому

    How work new wirless mobile make a voice

  • @buurtstation7106
    @buurtstation7106 2 роки тому

    I like your videos but its a pity that you placed the the Duch professor of the Leiden university in Danmark in stead of the Netherlands.

  • @AllenMorrisColonel
    @AllenMorrisColonel 3 роки тому

    Thanks for your efforts! You Go You!

  • @matermangros
    @matermangros 2 роки тому

    Love your videos... They're awesome 😊... On another note... If Galvani had battered and fried those frog legs, he would have beaten Pied Majorcanis Esq. by one hundred years as the first person to fry the delicacy frog legs... 😜

  • @timelordtardis
    @timelordtardis 2 роки тому

    Of course Galvini's experiments with the frogs legs (No French jokes please) gave rise to a young lady writing a story about the life giving powers of the electricity plus a whole plethora of films; the young lady was Mary Shelley and the book Frankenstein.
    Since Benjamin Franklin was one of those wretched rebelious colonists his work on using pointed lightning conductors was decried as nonsense and ignored in Britain. The effect on church spires, being some of the highest points at the time, of ignoring Franklin's work can be imagined.

  • @sickprophetvj
    @sickprophetvj Рік тому

    Franklin era un loquillo

  • @robertbdesmond
    @robertbdesmond 2 роки тому

    Too much hand motion…

  • @surendrakverma555
    @surendrakverma555 2 роки тому

    Excellent information. Thanks 🙏🙏🙏🙏🙏🙏🙏

  • @you8164tube
    @you8164tube 2 роки тому

    Great videos. You can ignore me as I am just picky. At around 8:56, you said it is not draining electric fire from the clouds but induction instead. However, they seem to be the same thing. And it eventually drains the electricity from the clouds anyway.

  • @gnarfgnarf4004
    @gnarfgnarf4004 2 роки тому

    Extremely informative and original. Thank you.

  • @picksalot1
    @picksalot1 2 роки тому

    Fascinating history and connections of what propelled scientific advances. Thanks

  • @bchoward0000
    @bchoward0000 2 роки тому

    I've really enjoyed your videos - thank you. The way you did the dates in the corner on this one was excellent - didn't stop the flow but kept us aware. Very James Burke indeed!

  • @clenlima
    @clenlima 3 роки тому

    Good channel! It has a good closed caption. Thank you very much! I will share.

  • @biblical-events
    @biblical-events 3 роки тому +1

    Amazing video 👍

  • @justinahole336
    @justinahole336 2 роки тому

    I enjoyed the video too!

  • @danielpirone8028
    @danielpirone8028 2 роки тому

    A bad proem - lol !!!!

  • @joecummings1260
    @joecummings1260 2 роки тому

    If I got hit with a lightning bolt, even though I know it's electricity, I'd still think God was out to get me

  • @josephrapoza6453
    @josephrapoza6453 Рік тому

    Your work should be part of a school curriculum.

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  Рік тому

      I think it is part of a school curriculum in Canada. Or at least they asked me if they could use it and I said sure 🤷🏻‍♀️

  • @susilgunaratne4267
    @susilgunaratne4267 2 роки тому

    Best Static Electricity theory & demo lesson I ever had.

  • @MrSaphire0803
    @MrSaphire0803 Рік тому

    Any updates on the book? I'd love to read it.

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  Рік тому

      It is out! And available on Amazon or from your local bookstore or even in your local library. My book is called “the lightning tamers” and my name is Kathy Joseph. ❤️

  • @tigranavemian803
    @tigranavemian803 Рік тому

    Very interesting

  • @NicleT
    @NicleT 3 роки тому +1

    Excellent! Thank you so much.

  • @g1a18
    @g1a18 3 роки тому

    Longtime no see

  • @davidclark3603
    @davidclark3603 Рік тому

    "Brilliant"!

  • @bogdanyer
    @bogdanyer 3 роки тому +2

    Great video as always

  • @gullenator1
    @gullenator1 2 роки тому

    Is the follow up video to this in the works?

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  2 роки тому

      I got a little distracted, sorry. I Will get to it eventually, but I’m not exactly sure when that eventually will be.

  • @markstewart9038
    @markstewart9038 3 роки тому

    I always love your videos! Thank you and I look forward to your book.

  • @devismarkam3871
    @devismarkam3871 2 роки тому

    Mam please suggest me a book on history of Electricity

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  2 роки тому +2

      My book, coming out spring 2022. Join my mailing list (in the about me page) and you can be among the first to get a copy 😉

    • @devismarkam3871
      @devismarkam3871 2 роки тому

      @@Kathy_Loves_Physics can't believe you replied quickly, I am from India

  • @margidim1472
    @margidim1472 2 роки тому

    Nice

  • @ajithkumarg3219
    @ajithkumarg3219 3 роки тому

    Wonderful Kathy❤️❤️

  • @kundaliniyogi11
    @kundaliniyogi11 2 роки тому

    Thankful for your video🌈

  • @mrmcafeeboat2887
    @mrmcafeeboat2887 3 роки тому

    Ma'am, Were is Michael Faraday in this video 📹

    • @Kathy_Loves_Physics
      @Kathy_Loves_Physics  3 роки тому

      He’s in the next video. He didn’t start working for Humphrey Davy until 1912 after the arc lamp.

    • @clarencegreen3071
      @clarencegreen3071 2 роки тому

      @@Kathy_Loves_Physics *1812 . . . oops!