Electromagnetic Waves - with Sir Lawrence Bragg

7 років тому

Experiments and demonstrations on the nature of electromagnetic waves.
The nature of electromagnetic waves is demonstrated first with the aid of models and then by a reconstruction of Faraday's experiment on induction. The range of electromagnetic waves is next illustrated, followed by a series of experiments using a klystron. The measurement of wavelengths is introduced by showing standing waves with the Vinycomb model, Sir Lawrence then illustrating the same principles by applying electromagnetic waves to Young's pinhole experiment.
From the original programme notes: Sir Lawrence Bragg at the Royal Institution of Great Britain Since 1826 a series of lectures, planned for young people, has been given at the Royal Institution during the fortnight after Christmas. These lectures, 'adapted to a juvenile auditory' to use the nineteenth-century phase, were started as a new venture in science teaching. It is the tradition to illustrate the CHRISTMAS LECTURES with numerous experiments which are on an impressive scale and as far as possible of a novel type. Many experiments first shown in the Royal Institution theatre have become classical bench-experiments in schools and colleges, and many of the best popular scientific books have been based on CHRISTMAS LECTURES. A scheme was launched in 1955 to give corresponding lectures throughout the school year, because it seemed very desirable to use the facilities and traditions of the Institution to the full and thus make it possible for a larger audience to participate. The idea was proposed in the first place to a few science teachers in schools, and with their help it was started in a small way. The lectures had an enthusiastic reception, and the scheme soon grew to its present proportions â€“ over twenty thousand young people now come to the lectures each year. The main idea behind them is to show experiments, illustrating the basic principles of science, which are on too large a scale or involve too complicated apparatus to be readily staged with school resources. The majority of the lectures are on physical subjects, but chemistry and biology are also represented. In 1965, Lord Bowden, who was then Minister of State in the Department of Education and Science, expressed a wish that the lectures given by Sir Laurence Bragg be recorded in the form of films, and arranged that a sum of money be earmarked for that purpose. The series Sir Lawrence Bragg at the Royal Institution is the result of his interest. The films have been commissioned by the Educational Foundation for Visual Aids and shot on the premises of the Royal Institution. At first an attempt was made to film the actual schools' lectures, but there were a number of drawbacks to this procedure. Ideal positions for the cameras were not possible in a crowded lecture room. An hour's talk is too long, the film had to be divided into three or four sections, and it was not easy to tailor beginning and ends to the sections. It was finally realised that it would be much better to shoot each film as a separate project, with no audience and complete freedom for the camera team to take the long shots and close-ups in the best way. The possibility of close-up shots is a great advantage, because it enables effects to be shown which it would be impossible to demonstrate in a large lecture room. The present series consists of sixteen films covering the schools' lectures dealing with magnetism, the properties of matter, and vibrations and waves. It is hoped to include electricity and other subjects in a further series. In the main, the experiments are those actually shown in the schools' lectures, modified for filming where desirable. The action before the camera is in each case carefully rehearsed so that the performance of the experiment is seen as clearly as possible. No attempt however has been made to prepare a 'script'. The talk is quite informal, not a prepared one, in the belief that it will be fresher and more interesting if given in this way. It is hoped that the imperfections, inevitable in an impromptu talk, will be overlooked for the sake of its more personal nature.
Crown copyright information is reproduced with the permission of the Controller of HMSO and the Queen’s Printer for Scotland.
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КОМЕНТАРІ: 470

@RichardBronosky 2 роки тому

I did not expect the glass lens to affect the EM waves like that! That really makes a connection for me that was always missing. The idea that radio, light, and X-rays are the same "stuff" but at different frequencies is now clear in a way it never had been before. My mind is blown.

@shazzz_land Рік тому

a couple of year ago in some campus dorms in east europe which didn't have internet cable in every dorm but only a wireless point at every floor people would put their wireless receivers near some windows in the hope of getting a better signal. curious now if a decent size glass jar with the opening towards a wireless emitter in which you'd have a wireless receiver would amplify the signal

@WSmith_1984 Рік тому

Here's some more for you. Modern science isn't correct..... All energy and matter in one simple explanation.... here goes... First we have a radio wave all the way to gamma waves which in turn create hydrogen then from there everything is basically a compound of hydrogen and will decay back to hydrogen before turning back to gamma waves..... There are no free moving electrons within matter.... I use this analogy to simplify it in my mind..... imagine a line of people standing a mile long (each person represents a copper atom in a wire) the first person starts a Mexican wave at one end ( the source ) , as the information propagates along the line ( by exciting each atoms magnetic field ) you would see an continuous wave of the peoples arms transferring the charge/information back and forth but the atoms and electrons don't actually move at all..... Think about it, from the source where electricity is "generated" to the ultimate end use, there's various breaks in chain of that electricity, it goes through controllers, transformers, all sort of components.... the transmission happens because of the magnetic field strength of the atoms in the wire being increased and decreased, not because of an actual "electron" flowing anywhere....

@RichardBronosky Рік тому

@@WSmith_1984 I like it!

@ronarant2897 Рік тому

Yes that was very interesting and informative! I was also surprised by that, I wish these types of experiments and demonstration were still done, I think it would help in the understanding or it would have helped me at least.

@claudiozanella256 10 місяців тому

Indeed I have the same problem, he uses a PERSPEX lens, how can it focus EM waves? Something is wrong.

@quartztoe4285 Рік тому

People who were alive during the invention of this technology really teach it better than people nowadays. Nowadays, people just assume you know things and skip past all the fundamentals, but back in the day, they had just learned of this technology and they taught it to newbies the way they learned it.

@saliva776 2 місяці тому

I guess em-Waves werde discovered 100 - 150 years earlier..

@nickharrison3748 5 років тому

Super..much better than modern animations

@aniksamiurrahman6365 2 роки тому

Sir Bragg is a legend.

@kundeleczek1 2 роки тому

It is much easyer to animate than make things in real. Beside, you have full control during creating animation.

@Traderhood 2 роки тому

Nonsense.

@wphubert 5 років тому

This is a fine demonstration why fundamentals need to taught by great masters and not grad students. A marvelous opportunity to learn !

@bobodeyuca 4 роки тому

There are some pretty good grad students tho, when they aren't swamped with their own work

@johnc3403 Рік тому

Great learning can be found in many places and it is good advice to grab it with both hands, be critical in your thinking and question everything. Don't be taken in by a pipe, a tweed jacket or some grainy footage, at least, not for sentimental reasons. That's not what we are here for. The laws of electromagnetism have not changed and there are many modern teachers that will take you down the rabbithole of EM theory, just as well as Sir Lawrence did here, ..if maybe a little less dapper in presentation :)

@WSmith_1984 Рік тому

@@johnc3403 here's some for you. Modern science isn't correct. All energy and matter in one simple explanation.... here goes. First we have a radio wave all the way to gamma waves which in turn create hydrogen then from there everything is basically a compound of hydrogen and will decay back to hydrogen before turning back to gamma waves..... There are no free moving electrons within matter.... I use this analogy to simplify it in my mind..... imagine a line of people standing a mile long (each person represents a copper atom in a wire) the first person starts a Mexican wave at one end ( the source ) , as the information propagates along the line ( by exciting each atoms magnetic field ) you would see an continuous wave of the peoples arms transferring the charge/information back and forth but the atoms and electrons don't actually move at all..... Think about it, from the source where electricity is "generated" to the ultimate end use, there's various breaks in chain of that electricity, it goes through controllers, transformers, all sort of components.... the transmission happens because of the magnetic field strength of the atoms in the wire being increased and decreased, not because of an actual "electron" flowing anywhere....

@SplendidKunoichi Рік тому

@@johnc3403 indeed, for some reason people always seem to forget there's a happy medium between great master and grad student called a teacher

@chrisstrobel8490 5 років тому

Actually seeing the experimental apparatus used to investigate these phenomena is truly eye opening.

@adurgh 5 років тому

Why isn't science being explained this elegantly anymore nowadays?

@RiArchives 5 років тому

We'd like to think we're still carrying on the legacy of the greats who have come before, from Faraday and Davy to the Braggs and Longsdale. Whether you're interested in long-form or short-form science content, UKposts exclusives or broadcast TV shows, our main channel uploads new content every week - ukposts.info

@bobodeyuca 4 роки тому

I'd argue that it is! There are some really really great lectures all over the world. Additionally, we have resources like youtube, and books like Griffiths Introduction to Electrodynamics for free as a pdf on the internet. If people have a bit of calculus and diff eq background (if not khan academy is great) the world is their oyster! You can pretty much learn whatever you want

@adurgh 3 роки тому

im quite familiar with most of the resources you’ve mentioned. They are very good, but nothing that comes close to this here, as far as physics teaching goes..

@whiterottenrabbit 3 роки тому

Because nowadays, everything is done in a really half-assed don't-give-a-shit manner, including explaining science.

@vk6832 2 роки тому

Because people scream about it being 'White supremacy'

@mahfknamsayn3819 2 роки тому

That visualization of a wave with moving parts is amazing

@patricksmith4424 Рік тому

When you hear a man speaking in that old fashioned more upper class English accent, you listen! I learned so much, and this is how physics should be taught, thanks for posting.

@user-du7oe6mm3k 3 роки тому

It's butefull lesson. Благодарю тех кто выложил. Такие лекции заставляют задумываться над многими процессами .

@alexeyleontev7220 2 роки тому

Что за излучатель в его опытах не подскажешь?

@zapthathattrick 5 років тому

I wish to goodness high school and colleges taught concepts like this before beginning the math

@abdullahalmosalami2373 5 років тому

The math is what gives you proper respect for the physics, and also shows you even more on how beautiful the phenomenon you are observing is.

@eumesm9770 4 роки тому

It's like he said. 02:49 what he is teaching it's just 'the nature of this'

@davidmiller4942 4 роки тому

I agree showing concrete before the abstract is very important. Show visually first and then the math to explain it. Then, the Math becomes much more interesting.

@kimmarlow309 3 роки тому

It's interesting that he pointed out it was Faraday that made the discovery, who could not do the math. Maxwell who could do advanced math was able to refine Faraday's work into exact math equations. Quantum super semetry is basically described as best guess for X1 and X2 and 3and4. In particular physics they use the P word to signify best guess on what you know. When they hunted the Higgs particle they thought it should appear within an estimated energy range. There again best guess. You can sum it up as the field of discovery isn't going to be the work of elegant equations, but after the discovery then the math can make the discovery universally understandable, and defined. In Physics Fineman had all kinds of squiggly lines and arrows he used instead of math, because they represented what he thought, but couldn't prove.

@woodytedttrailhunter7606 3 роки тому

bzzzt, wrong.

@jeremiahmullikin 12 днів тому

I'm fortunate to have viewed this presentation.

@alocin110 Рік тому

What Sir Lawrence Bragg demonstrating is well understood: He demonstrated the deference between Education and Learning. Hats off to him in respect.

@AndrewKamenMusic 4 роки тому

The way this is filmed is incredibly therapeutic lol

@banibandyopadhyay4698 5 років тому

He is my favorite scientist since i was 10 years old now i am almost 18 it has been 8 years aprox and i been loving physics since...physics is my first love...

@unlikelyprophet3260 5 років тому

The earth os flat covered by molten glass dome saline sea moving around magnetic mountain at north generates charge which is conducted through this firmament simultaneously powering stars and running sun positive hot and moon negative cold lights around mixing air into noble gas filled upper atmosphere now you know what tesla knew and you can understand our fathers creation

@wheelie63 5 років тому

thats cool........wb

@johnlbales2773 6 років тому

Outstanding! Wish I'd seen these demonstrations in 1968!

@BiancaAguglia 2 роки тому

I wonder if any of the people from 1968 wished they could see these demonstrations in 2021. 😁 I know what you meant though. It would have been amazing to attend one of Sir Lawrence Bragg's presentations.

@Fomites Рік тому

Was it 1968? I was wondering. If so, how did you find out?

@muhammadaltaf9651 5 років тому

Thank you Sir for such a great lecture and your contribution in science education.

@jamesmhango2619 4 роки тому

Finally feels confident of what i thought i knew.

@sau002 5 років тому

This video should formally become a part of school curriculum

@glutinousmaximus 5 років тому

Quite brilliant demonstrations! Thanks for posting!

@paulwolf3302 2 роки тому

Old school physics, I love it. In college I used Debye Scherer & Guinier cameras and developed the x-ray film in a darkroom, and measured the spacings between the rings with a ruler to get interatomic distances. In grad school one of my jobs was to automate an 1960s era diffractometer with a DEC PDP-11 computer, putting stepper motors on it. Before that, there were ordinary motors and the diffraction pattern came out on a chart recorder that was also analog. This seemed like the cutting edge of science at the time, lol.

@ronaldhenry4057 4 місяці тому

Fantastic presentation on EM energy and waves. Thanks.

@brahimimohammed9418 6 років тому

Great Video many thanks

@MN-sc9qs 6 років тому

Great public demonstrations!

@K.D.Fischer_HEPHY 2 роки тому

Btw... this Klystron was rocking a solid 30GHz ! Stunning to think about that this has been allready done in the 50's.

@robertgift 5 років тому

Interesting to see demonstrations! Thank you.

@MirlitronOne 8 місяців тому

TWO great science educators at work; Lawrence Bragg AND Bill Coates, long-term senior demonstrator at the Royal Institution. I am glad to have had the privilege to meet the latter, a personal hero.

@hablemossobreciencia1243 2 роки тому

Genial! Una de las explicaciones más claras de las bases del electromagnetismo que he visto. Realmente excelente!

@ProDroneControl 2 роки тому

Amazing!! With zero mathematics, a rare gem video making us watch the actual behaviour of invisible. Grear professor.

@luisboza4361 2 роки тому

I KNOW ABOUT EM WAVES EVERSINCE I WAS VERY YOUNG WHEN I USED TO STUDY RADIO AND TV. BUT THIS CLASS DEMONSTRATES THOSE PRINCIPLES SO WELL THAT NOTHING'S LEFT FOR IMAGINATION. YOU ACTUALLY SEE WHAT HAPPENS. WHAT A MASTERPIECE OF PADAGOGY. SCIENCE FLOWS LIKE A RIVER WITH THIS EXPLANATION. GOD BLESS SIR LAWRENCE.

@nadmey9099 6 років тому

How beautifully demonstrated. Good old days

@user-vt2ve6wq5x 5 років тому

One of the most amazing things on this video is the use of a Glass lens to capture and focus a radio wave into the antenna. That was amazing ! I seen it and said No Way!😮 But simple physics works !🤔 I will have to try this! I want to build a super antenna. I heard that using Mercury in a tube connected to your antenna it works great.

@Gabeyre 3 роки тому

When measuring the Wavelength, the professor clearly said that based on the lengths measured, the waves were short in length and were similar to light waves not radio which have longer wave lengths. Or perhaps he changed the wave generating apparatus after using the lens and before measuring the wavelengths..

@malcolmbeale4970 2 роки тому

Thank you, an incredible illustration of electromagnetism and wave propagation. The video is a gem.

@kidschannel6614 2 роки тому

I have to say that this is the most simple and exciting lecture I've ever taken in my entire life. I just really hope that physics is taught in this way all around the world to make new scientists.....

@julioduran2615 5 років тому

Good demonstration about electromagnetic waves. Thanks for the video.

@mostafaabdelaziz2316 3 роки тому

You changed my way of thinking about EM waves...really better than modern explanations with animation

@algorithminc.8850 2 роки тому

Wow ... a wonderful find ... of real quality ... both this video and your many archives. Thank you.

@alexandrpetrov1110 2 роки тому

This is a fine demonstration why fundamentals need to taught by great masters and not grad students.

@robertolarios4199 5 років тому

Really a privilege to learn from a Nobel Prize.... And yes, he´s the one (with his father) of the Bragg´s Law !

@mrburns2101 10 місяців тому

Excellent DEMONstration.

@MitzvosGolem1 5 років тому

Outstanding. Thank you.

@shyleshsrinivasan5092 5 років тому

Thanks a lot for sharing these videos !

@birgermuller3687 6 років тому

Very informative and easy to grasp. This British gentleman is a good teacher indeed.

@ianl707 Рік тому

He was Australian. He was also the youngest person ever to get the Nobel Prize in physics or chemistry.

@aronhighgrove4100 Рік тому

@@ianl707 This ageism is annoying and *not* a good indicator if someone is smart, a good teacher or not.

@gristlevonraben 5 років тому

great video, great examples, thank you to him and you

@johnx9318 2 роки тому

The perfect teacher. Thank you.

@sandaloroldan5005 5 років тому

Many thanks for sharing this pearl of wisdom

@mjb8658 5 років тому

Excellent. Really enjoyed this one. Thanks.

@MotorGuyzer 5 років тому

Marvelous presentation

@kapsabet3 Рік тому

The best physics lesson I ever had. Thank you.

@michaelvenard5457 2 роки тому

This is awesome. Explanation made simple.

@islamzohny4166 6 років тому

it's amazing explains .. thank you Ri Archives

@jaymzs8221 Місяць тому

Maybe not the most charismatic gentleman but I do love all the demos! Helps the simple mind (like my own) grasp these abstract phenomena.

@k.v.saimadhav4251 5 років тому

superb demonstration and experiments

@maxasaurus3008 20 днів тому

Interesting demonstrations, thank the physics gods someone had the forethought to record it! The intro leads me to hope there might be one or two more topics covered. ❤

@Stephen_M. 8 місяців тому

Great video! Answered several of my questions.

@generuffalo4374 6 років тому

50 Hz ?? ( @ 4:56 ) NOW the British accent MAKES PERFECT SENSE This is ABOVE and BEYOND anything, and everything I have viewed on UKposts thus far

@otilium7503 Рік тому

A very good demonstration of what light really is. A blazing magnetic wave!

@mamamia8511 5 років тому

true knowledge is pristine and clear

@edgarfov Рік тому

Incredible teacher. Such a clear demonstration, beautiful apparatuses. mechanical heaven for me. tnx.

@anabelcamacho6584 5 років тому

real knowledge is pleasurable to receive

@VPXM2012 4 роки тому

This knowledge is actually just a description of all the stuff people should know. It's like going to a restaurant, and the waiter is spoon feeding you.

@leosmi1 5 років тому

Omg the focus lens blow my mind

@Mark-xq6ux 5 років тому

This really is amazing. It visualises something invisible and helps understanding electromagnetic waves. Thanks a lot.

@user-ys9kz8lf9f 5 років тому

Супер! Красивые опыты. Сейчас одна компьютерная симуляция.

@Verschlungen 5 років тому

Of the various comments, I believe yours is the only one that touches on the most important aspect: namely, that "one computer simulation today" cannot possibly compare with a demonstration like his that uses a wide variety of beautiful physical equipment!

@DmitryShevkoplyas 2 роки тому

Magical! Thank you !!!

@PacoOtis 2 роки тому

Bravo! Well done, old boy!

@andyash5675 2 роки тому

It's really amazing to hear it from the man himself. A bit like the Feynman lectures on Quantum Electrodynamics.

@morewealth23 3 роки тому

Glad to have found this wealth of information

@sunilgoyal7739 2 роки тому

This was amazing learning Thank you ❣️

@ZopcsakFeri 2 роки тому

Did I just watch a person bragging for 20 minutes straight? I have to admit, I thoroughly enjoyed!

@Pradip2547 5 років тому

It's very important video...

@Vinodsinha19 5 років тому

Very good lecture ! befor , I watching this video I don't know what is EMR after I know about what is EMR . Thank you sir

@carmelpule6954 5 років тому

This is an interesting video indeed. I would have liked to have heard Sir Lawrence Bragg mentioning the fact that electromagnetic waves are to be looked upon as any other formation of ELECTRIC LOOPS and MAGNETIC LOOPS linking each other. For any machine to work, an ELECTRIC loop MUST link at right angle with a MAGNETIC loop.This relation must also exist for DC conditions. In AC conditions, the loops are oscillating but they are still LOOPS, just like two wedding rings, linked, CURLING each other at right angle. These loops were clearly "seen" when he used the transformers working at 50 Hz. The electromagnetic wave in the waveguide and the horn he used, were also loops of magnetic fields linking loops of electric fields. and while in the waveguide the loops of magnetic fields were always in the waveguide space, while the electric loops flowed along the walls of the waveguide and crossed the rectangular waveguide across its flatter face. These loops called the E/M loops kept on creating each other as they left the waveguide horn. What was shown as LOOPS in the transformer, remained as loops in the air between the transmitter and receiver antenna . I wish he said that. When he showed the induction coil experiment he said "When I move the magnet INTO the coil..............." Well of course, he did say that he moved the magnet INTO the coil, but the magnetic lines parallel to the motion did not generate the voltage in the coil by the magnetic lines moving INTO the coil parallel with the motion as what happens is, that more magnetic lines crossed RADIALLY to fill the centre, to cause a rate of change of magnetic flux, which crossed the coil at right angles in a radial manner. I would have been careful when using the word INTO the coil at 2:30, as that suggests that the magnetic line moved parallel with the central axis of the coil and that sort of movement does not generate a rate of change of magnetic flux. The magnetic lines parallel with the movement, "moved radially" to cause the rate of change of magnetic flux linking the coil. If he used a rotating generator that is how the magnetic flux would have moved into the coil, sideways. In fact the rate of change of magnetic flux is clearly shown by the meter as when the magnet was stationary inside the coil, the meter returned to zero . When he withdrew the magnet from the coil the magnetic flux crossed out in a radial manner giving the deflection in the other direction. The magnetic field around the end of the magnet he used is rather complex I wonder how many viewers deciphered " INTO" and "OUT OF" in the right meaning of rate of change of magnetic flux. Again, when he had the coil picking up the nails, 3:13 he was absolutely correct when he said, " we make electrons RUN AROUND this wire", as that suggest the ELECTRICAL LOOP that I spoke about. But when at 2:22 his finger went straight down showing the magnetic field went down into the coil, there he should have said that the electrons going around the loops of the wire would create magnetic loops going AROUND the coil through its central orifice/ opening and not just straight down. When he showed the standing waves using the mechanical arrangement at 16:36 Sir Lawrence Bragg said that each wavelength included two LOOPS. Again I am afraid to say that the model is not an exact model of an electromagnetic wave as the Potential Energy is stored in the rubber at the central axis and the moving weights the kinetic energy and there are no LOOPS anywhere in that model. Those we see are not loops, but a sinusoidal shape where the intensity of the motion goes positive and negative but not in a loop. In an electromagnetic wave each wavelength does have two full LOOPS but they are not in the forms Sir Lawrence has shown. An electromagnetic wave proceeds to use the loops as shown by that transformer experiment where the coils included the FULL ELECTRICAL FIELD OSCILLATING LOOPS and the iron paths contained THE FULL LOOPS OF THE OSCILLATING MAGNETIC FIELD . It is E/M linked and curling loops that reaches the receiver from the transmitting antenna. Loops, always full loops. When at 1:05 he described waves using matter and electrons and electromagnetic fields do not use any matter, he should have hinted that the VOLTAGE at the antenna would create a voltage PRESSURE and it is the voltage field that can be radiated into space where there is no matter. But voltage pressure on its own will arrive at distant points but will never carry any information in that CONSTANT pressure state. But the RATE OF CHANGE OF PRESSURE which is related to RATE OF CHANGE OF ELECTRIC FIELD well now the rate of change of electric field is what one can use at a distance . A whip or a loop antenna can have fields due to voltage pressure or current flow in them but it is the rate of change of the Electric Fields or Magnetic fields LOOPS that can cover the distance in space where there are no particles, What is more, it is the RATE OF CHANGE OF ELECTRICAL AND MAGNETIC FIELD THAT CAN CARRY OUR INFORMATION. Well, really the rate of change of an electrical loop is really a special form of current , a special current, a little different from a conduction current, the latter moves where there are particles but the current due to the rate of change of electric field exist where there are no particles. Recently I tried to make an electro-mechanical model of an electron whose characteristic will cause the "model " to behave as the real electron behave. In this model I had to include, Mass, negative charge, but not in one central mass, but distributed negative charges on a flexible membrane which will cause the many elemental negative charges to oscillate on this flexible membrane, Well, as the elemental charges oscillate they create a circular magnetic field around them and as a whole the mode of vibrations are similar to the higher modes of vibrations in a tuned high frequency cavity. These voltage vibrations creating the electrical and magnetic looped fields are biased in their voltage potential because of the accumulated negative charge of the whole electron. When stationary the mass and charge and the biased E field are available to the outside world but not the magnetic curls in different orientations, When the electron as a whole is moved by shooting it or under the influence of an external electric field or when an external magnetic field is moved towards it, the magnetic loops line up and the moving electron will create a curling magnetic field with its direction of motion felt in the outside world. I have tried this model to explain the working of Motors, Generators, transformer, back emf in inductances, mutual inductances, capacitors , heat radiation in resistors , light emission from red hot metals , It seem that in its form, my model can show mass characteristics and also wave motion characteristic. I should publish this, as through its simplicity, it offers quite a few explanations why the electron behaves as it does in any of what Sir Lawerence Bragg described in this video.

@GODT1TAN 5 років тому

I'd like to hear more about your model

@AntonioTFernandez 5 років тому

holy crap thats a lot of writing, isaved this on a docx ill read it later thanks for taking the time to explain concepts that are important and elusive

@Me-qh2ux 5 років тому

@@AntonioTFernandez on the other-side of the planet there is someone like u who did the same.. and its me

@elams1894 5 років тому

Hi, I read your comment and you seem well versed in field theory. Firstly, can you define an electron and what is a negative "charge". In your model, are you not describing a capacitor? Cheers

@Kalumbatsch 5 років тому

I'm sorry, but that's just a load of babble.

@TechNed 5 років тому

Thank you, Ri.

@mitchs2148 11 місяців тому

this is so wonderful, thank you so much!

@robertoxavierdossantos2231 4 роки тому

Just wonderful.

@yuvaraj8750 Рік тому

Mind blowing proff👍🔥🙏 brilliant

@K.D.Fischer_HEPHY 2 роки тому

Great document of science history. Love the giant wax prism 10:15 😁

@marcelorofer 5 років тому

Amazing!!

@jamesleem.d.7442 6 років тому

This guy "Coates" made a great straight man: Rigid facies, never smiled, always immediately on cue. I laughed so hard I fell out of my chair here in the lab. Great teaching !!

@alwayscurious413 5 років тому

Great spot. He appears on many such videos and was an unsung hero. He instinctively knew he was not the star of the show and so got on with the job classic style. Same thing happens in rock concerts too when a roadie comes flying in from stage left to catch a falling microphone stand etc, change guitar. Morecambe and Wise lampooned this kind of thing with the singer Shirley Bassey where they wore the obligatory brown labcoat used to denoe the role of the 'unsung'!

@_BhagavadGita 6 років тому

Fantastic.

@natarajsetty851 3 роки тому

In my school age if I could have this kind of teacher I could have become a great scientist

@Ccccccccccsssssssssss 5 років тому

Thank you!

@sunahangrai3601 Рік тому

this video series is a great series on experimental basis for chemistry

@climbeverest Рік тому

Incredible professor

@moamoa3303 3 роки тому

this is extraordinary ❤️❤️❤️

@Welcometothemandela Місяць тому

This was a really interesting and great video. He was able to explain things very well, kept me interested in what was going to happen

@healthisliving7698 4 роки тому

Wow grabe! I learned a lot thanks to this channel...

@garysewell5465 11 місяців тому

Fascinating

@dinnade9338 5 років тому

Love this video.. These days we need more experimental videos likes this ... not sure why this got 40 dislikes?

@Number6_ Рік тому

How do you know it got 40 dislikes?

@aronhighgrove4100 Рік тому

@@Number6_ Dislikes were still visible years ago.

@inspirationalmarvel 10 місяців тому

This is too much for just one video 🎉🎉🎉thank you so much best science video ever watched on UKposts by me

@NUKE-W.E.F. Рік тому

Got to hand it to the Royal Institution Of Great Britain, they make some very informative videos!

@shamelame6367 Рік тому

Very nice lecture!!!

@zachreyhelmberger894 Рік тому

Nicely done!!

@zachreyhelmberger894 Рік тому

I too was surprised that a glass lens could do that with RF! Maybe this could be used to make much more compact beam antennae for ham radio?!

@ovalwingnut 3 місяці тому

What a wonderful career. Helping others "to understand"... 500 good human points awarded - posthumously I wish I was better at math & engineering. I wasn't so I had to settle for working at Boeing