How did Hertz discover radio waves & what does that have to do with Maxwell's equations? Watch this video and find out! Thanks to Kim Nalley for the lovely music
Correction: At the end of the video I mention that Tesla went to Paris for the World's Fair 5 years after Hertz died. He actually went 5 years *before* Hertz died. Sorry, I blame my small children for all of my mistakes :)
There is much jealousy among very intelligent, competitive, proud, vain people. A lot of jealousy. It is very suspicious that Hertz died in this manner - it is not without possibility that he was poisoned. It seems very odd that he became ill **after** his discovery was published and taking the Director of Physics job at the young age of 32.
Kathy: what Dr. Felton does for history you do for Physics. I am facinated by these things since very early childhood. I now work in the field of power generation and control including marine and industrial diesel and control and power managemen I also design ang build custom equipment for this market, including alternative energy. . I am lucky I didn't electrocute myself or burn down the house when I was a kid! You present these videos in a magnificent way , dense packing information in minutes that took much time and effort to learn. You are planting the Seed Corn of a crop of future Engineers and Physicists here. I most certainly wish these vids were available in 1964 when I was eight. I would have gobbled them up as eagerly as I do now! But I made do with old US Navy manuals that are almost as good as your vids. They also presented the history and theory behind the development of the technology we use. They are Very Well Written and Illustrated. I was lucky to find and get a hold of them! Your Brilliant Vids Are Even Better! I Really wisk I had access to these when I was a kid!!! WOW!
@@Greg_Chase Are there any suspects? Could he have ‘zapped’ himself? How many electrochemical/physics researchers were injured because of lack of safety precautions?
@@fare2muddlin Considering his young age at which he attained a fairly prestigious career position - and had made the breakthrough at proving Maxwell's "electromagnetic waves must exist" idea - and also considering the intellectual toil and dead-ends suffered by most scientists - I feel safe in speculating that his early demise may not have been natural. The timing of it is the noteworthy part. After he developed the first wireless transmitter experiment that could be duplicated and shown to be correct by others. After attaining a fairly prestigious career position. But no way to know for sure. Having tea several times a week with a jealous colleague once he was settled in his new position. Was their opportunity to get at him? Probably. But we just don't know.
Up until now, I thought that Hertz was weirdly inept or lazy. He discovered radio waves and didn't think of the radio, he discovered the photoelectric effect and didn't follow up like Lenard did. Why? Oh, he died tragically young. Thanks Kathy, I would not have looked up his life and learned more about him if it hadn't been for you. I now have much more respect for Hertz. If only the History Channel were the way they used to be instead of making programs about extraterrestrial aliens, they would do what you are doing. Keep up the good work.
I am so glad I could introduce you to how amazing Hertz was, I am still sad about his early death. And I agree about the History Channel, used to be so good. Sigh.
It's really interesting to see how this story extends between figures you normally don't even think about together (from Heinrich to Tesla). I'm enjoying these videos.
I'm glad you like the videos. I am constantly surprised with the links that I have found! I am thinking I should have called it "Links in the History of Electricity" or "Electric Connections" or something. When I am done with the videos I will try to publish a book with all of the material and maybe I will rename it. (ps. Did you watch the Faraday and Maxwell videos?)
Even though it's not the focus of the video, I think Kathy's explanation of how a vinyl record works is VERY good. Very simple and concise while being completely accurate.
This channel was one among I was searching For.. I really loved the content chosen.. The way of presentaion.. Combining History and Physics.. And Thank you 😍😍
I got a charge (pun intended..) when you explained that radio was NOT music. Most people have a very narrow idea of what radio is: broadcast AM or FM. I had someone "brag" that he didn't listen to the radio anymore. All the while he was playing Spotify over a Bluetooth speaker. I didn't bother to explain to him that a Bluetooth speaker was very much a type of radio receiver, so he WAS in fact "listening to the radio"! LOL.
Thank you for putting these videos in plain terms. Growing up we rarely had practical explanations in school to stimulate our interest. Your videos remind me of another series called, The Secret Life of Machines. A couple of English guys explain the history of home and office technology. Thank you for all your time and effort that you've invested for the benefit of the public.
Wow ! I am impressed ! Very interesting ! Very well and attractive explanations ! I like every episode ! Now I am a new subscriber ! Continue making these hystorical explained episodes (I salute you from Romania -east Europe)
Brilliant! thanks for these amazing historical facts. I have read that not all of Hertz's conclusions were correct, some of his conclusions were wrong because he didn't take into account the room's dimensions. Unfortunately, I didn't manage to find more details. Could you please make some research about it?
Thank you for pointing that out, I always want to add a "p" to Thomson's name, don't know why. I have to figure out how to add a little card over the video without redoing the whole video. Glad you liked the video aside from my spelling.
Hertz, had he not gotten sick, might have RE-invented wireless telegraphy, but could not have been THE inventor, since Mahlon Loomis had already demonstrated it decades earlier, without ANY knowledge of Hertzian waves. It turns out not to require an AC (let alone r.f.) source feeding the spark gap, because DC power (as supplied by kite and ground, Franklin style) creates r.f. transients when a long wire is switched into and out of contact with such a source.
Really interesting and clear information. Sad that Herz died so young, life's like, we must enjoy consciousness and live the best we can every day. Will share this with my classmates here in Mexico. I think there´s still a lot to discover in science that can make this a better world. Hope you´re really fine.
Sometimes a person buys a house that was previously a meth lab. Often the house has to be torn down. If you're going to buy a house you could talk to the neighbours first.
With a DC current there is no electric field, not even an induced one. You have to stop the charges with an excess in one place or another to produce a fixed field, or oscillate them (or otherwise accelerate, i.e. change, their motion) to induce fields. However, a DC current *does* produce a fixed magnetic field, as has been illustrated in earlier entries of this video series.
@@dougdoug2165 Let me get this straight...you have an ammeter that has a probe you clamp "around" a wire, and the other ammeter lead is what, grounded?
@@goodmaro no it looks like a lobster claw just like an ac clamp around meter. You simply open the claw and it has interlocking metal laminations inside that connect when closed. No other connection made it reads the amount of dc current flowing in amps.
@@dougdoug2165 Wikipedia under "current clamp" describes a few types of ammeter like that. There is no electric field around the DC conductor, but the clamp is able to measure the *magnetic* field from the DC, and from that the current can be calculated.
Metro Polis, sister: gentle Tesla, a student of Vivekananda, invented 'Remote Induction', not Radio, so did not apply for a Nobel. Germany's Hertz discovered 'precise' Transist-or (radio-waves is not radio) / for music, news, sports commentary,...at a young age, died? His children-like students published his researched work in one volume, and distributed globally. Xaverian and Bangaal, Jagadish Ch. Bose came accross a copy of the text...found a tail / wire hanging from it. Now, by using his own head Bose-da invented 'a general' Radio / wireless telegraphic device, that which fitted to Hertz's transistor, Graham Bell's wired telephone became wireless each, with the former, Radio-Transistor. The 1895 Kolkata, India Bose-da's demo. at Britons' Town Hall 'predates' others. Marconi's patent - 1901. And now, posthumously Hertz / precise + Bose / general should be given 'a Nobel' each. Kolkata, India, & SHARE globally.😢
Madam it will be nice to have your bio somewhere, number if children, the college you went to, your degree, how you are so knowledgeable in so many facets of physics and other subjects
Bought a beautiful house with what? Did you say with a "slight catch?" Or was there a hutch/ little house, that was used for experiments/chemicals? Just was mixed up in that is all, otherwise love the info. I want to make a simple very rudimentary radio with my son as a birthday gift. Anyone, feel free to share what you think would be a simple beginner "kit" - I'm a humanities girl, so be gentle 😅
May the therm 'waves' be incorrect. When we visualise a sine'wave' with an oscilloscope it looks like a wave. But does sound travels like a wave thru the air? No! It's a vibration of the air. Is this not the same for electromagnetic 'waves'¿?
According to the current paradigm, there cannot be longitudinal electromagnetic waves (these you are talking about), because there is no medium for them, that is ether. But, luckily, not every scientist accepted the false theory of realtivity. If you dig deep enough into the ether concept you'll realize that there is an ether and it can transfer all kind of waves, light along with gravitation. I recommend Robert Sungenis' book for your question.
Thank you so much for your fascinating videos. Perhaps I have missed it, but you don't seem to have mentioned Bardeen, Shockley and Brattain who won the 1956 Physics Nobel Prize for what I consider the greatest invention of the 20th century - the transistor.
Although I teach electromagnetics and I have been involved with this field for 30 years, your explanation is attractive and must be very useful to learners. I always like to listen to others explaining this immortal topic!
I love your channel! Learning about the OG's in electricity is sooo fascinating.Hertz's "Electromagnetic waves were of no use whatsoever" must be the mother of all understatement.
6:18 in order to create standing waves. He first had to move the mirror until he was getting a stable measurement. Only then, could he move and see that the amplitude is rising and falling per motion.
Cool video. However those are not Maxwell's original electromagnetic equations. Originally there was i j k the three vectors with an additional scalar component w, that was always left over when the vectors were solved. Oliver Heaviside took that scalar out because it would leave his vector calculus equations Unsolvable because they Didn't account for the curl of the field that had no vector. So the interpretation of hertz experiment is incomplete if you don't account for the curl of the em field lines which produces the effect of super position of the energy occurring in similar. Geometrical arrangements and therefore it is not a wave traveling first but a super position of a particular geometric energy configuration happening as a singular event instantaneously collapsing at the same time which produces a shockwave at the speed of light that interacts with the gas particles changing energy levels and releasing photons to compensate its rest mass energy level. The dynamics happening within the geometry of the vacuum always precede. Events observed in physical particles disturbed by the activity occurring in the vacuum beyond the speed of light
I always wanted to know the history of scientific development , and being a science student ,this is one of the best place i got this,this will help me a lot for development of my scientific understanding, thank you for such an amazing explanation
Entanglement got left out in the rush to (not even close) explain Radio transmission and reception. Loop Quantum Operator Logic Fields Modulation Mechanism and here-now-forever => Singularity of current attempts at Inflation and Gravity wave-packaging formation are much closer to Actuality of Superspin Supersymmetry positioning and temporal transverse trancendental logarithmic time-timing sync-duration identification. Does anyone Scientific want to keep this secret still, and if so, why?
On a sad historical note, Nazi Germany removed anything which honored Hertz becasd he was Jew. Moreover, the Nazi renamed the unit of one cycle per second to "helmholtz"; but the symbol remained the same, "Hz."
Kathy, these videos are great but you really need to work on your spelling. I think I’ve seen you misspell Marconi’s name three different ways already. It’s Guglielmo Marconi.
You stated that he proved that visible light is electromagnetic waves. But you didn't give any such proof in the video. He proved that he could create electromagnetic waves that are different than (visible) light and therefore they exist. But how does that prove that light is also electromagnetic waves?
Beautiful! I'm an Amateur Radio operator and am so glad that they renamed the unit of frequency measurement after Mr. Hertz...so instead of megacycles, we use megahertz! A lot of the old hams still say MC's instead of MHz!
