PHYS 101/102 #1: Electromagnetic Waves

Sdílet
Vložit
  • čas přidán 1. 06. 2024
  • Sparks fly-literally-as CU physicist Bob Richardson lectures on the propagation of electromagnetic radiation (1981)

Komentáře • 252

  • @bjbbshaw
    @bjbbshaw Před 9 lety +21

    Very stimulating to see the demos at a very human level rather than as diagrams in a book.

  • @fukgovernment
    @fukgovernment Před 10 lety +4

    My uni profs comes with a laptop and read all the bullshit inside. This is just so cool with demo, and it makes understanding much easier

  • @OtterLakeFlutes
    @OtterLakeFlutes Před 9 lety +14

    This is fantastic. Every time you try to ask a ham radio forum about something like many useful concepts in this, your question is over their heads so high they think your question doesn't make sense and you must be doing or thinking something incorrectly. Then you'll get an educated one (the minority of outspoken individuals) but he's likely to do a a whirling dervish dance around the answer trying to make it intangible or illusive like a doughnut hole. By the time he's done beating around the bush, he's forgotten what point his anticlimactic crescendo was ever supposed to amount to. I get answers faster watching entire lectures like this one!

  • @Xscott1000
    @Xscott1000 Před 6 lety +1

    Loved watching the use of those grand old devices - great video thanks for uploading.

  • @mybluemars
    @mybluemars Před 9 lety +5

    Beautiful demonstration of Electromagnetic Waves!

  • @obiwan042
    @obiwan042 Před 11 lety

    3 people not only do not understand physics but lack the desire to learn more as well as the appreciation for physics and the beauty of the universe.

  • @ahmadahere
    @ahmadahere Před 11 lety +1

    These physics videos are epic! I love the simplicity and the classic demonstration tools.

  • @1981Yassa
    @1981Yassa Před 10 lety +2

    Great and fun demonstration ! Well done !

  • @orozcoapaza1660
    @orozcoapaza1660 Před 6 lety +3

    I really enjoy learning, thanks for sharing knowledge Cornell University.

  • @TheZooman22
    @TheZooman22 Před 10 lety

    Nice demonstration... The use of the various devices clearly demonstrates the concepts and make it easy to internalize the theory.

  • @faizanzahid490
    @faizanzahid490 Před 5 lety

    This is rather more amazing some one making you visualize the theories. I'm unable to put my remarks into words for such great explanation.

  • @seshansesha7645
    @seshansesha7645 Před 4 lety

    Thank you for the excellent demonstration....

  • @jimpsky
    @jimpsky Před 11 lety +1

    Good vid. Bob Richardson, Nobel Prize in Physics (1996).

  • @meyou9655
    @meyou9655 Před 3 lety

    I'm just finding this great presentation now. I've been missing out.

  • @kj6bbs
    @kj6bbs Před 14 lety +1

    Thank you so much for this great explanation of EM waves.

  • @fabienpaillusson7390
    @fabienpaillusson7390 Před 7 lety +1

    Fantastic lectures!!

  • @radiofun232
    @radiofun232 Před 4 lety

    Best demo on You Tube about these phenomenon.

  • @1979Guts
    @1979Guts Před 14 lety +1

    this was excellent, i enjoyed it immensely. It would be great if cornell could do a more current version of this

  • @solo2wolf
    @solo2wolf Před 14 lety +15

    Outstanding demonstration. Much missed in today's teaching methods I feel.

  • @KevinAshcraft
    @KevinAshcraft Před 9 lety +1

    Cool Cornell University video from 1981 demonstrating how radio works. Perfect foundation information!
    #hamradio

  • @Sixalienasa
    @Sixalienasa Před 12 lety

    Very cool, I love the Early Days look of the junk involved. Great, really gets the mind open and working.

  • @wouldntyouliketoknowweathe4581

    The Corona discharge.
    2020: 👀👀👀

  • @DDDelgado
    @DDDelgado Před 5 lety

    Nice demo, i love it

  • @MrKorrazonCold
    @MrKorrazonCold Před 11 lety

    Yes I believe Q.A.T is correct.
    Matter is violent motion simulating rest and balance now through violent motion.
    The locational spherical inward absorption and outward emission of EM-Waves must be forming all forces of nature, antimatter matter annihilation forming + and - electric charge and EM-fields and the forward passage of time.
    The more violent the motion the greater the illusion of rest energy or mass the greater the absorption and emission rate the slower time runs within that ref-frame

  • @vishumishra0
    @vishumishra0 Před 8 lety +4

    What a beautiful way of explaining the concept . Heads off to you.
    And yes what happened with that electromagnetic wave you carried with yourself .

  • @ntomata0002
    @ntomata0002 Před 12 lety

    It is the same as like the coupling between the antennas. When the conductors (transmiter & receiver) are parallel you have maximum absorbion.

  • @Freerangeart
    @Freerangeart Před 14 lety +2

    this was so great, really helped me to understand

    • @CLoak183
      @CLoak183 Před 3 lety

      So, has this video inspired you to get your ham license yet?

  • @007MrYang
    @007MrYang Před 13 lety

    Im 17 and this is fascinating. Can't wait to actually learn it!

    • @CLoak183
      @CLoak183 Před 3 lety

      Dude. Have you got your ham radio license yet?

  • @SANDALKOTAWALABEE
    @SANDALKOTAWALABEE Před 8 lety +1

    Really amazing!
    Hats off to u Prof :)

  • @edakhi
    @edakhi Před 11 lety

    It's fantastic to realize how diference is the education between first world and third world.. in my case never saw all this, 1981 now 2012 it's fantastic... Soy de Ecuador

  • @FVInLPS
    @FVInLPS Před 11 lety

    that has actually been really good for people that study in countries that don't invest in props, such as mine ( i live in Dominican Republic), if it wasn't for power point we wouldn't be able to see things like this in some of my classes.

  • @KumarVibhav
    @KumarVibhav Před 10 lety +6

    Why didn't I have teachers like Him ?!

    • @MrUnder30seconds
      @MrUnder30seconds Před 6 lety +2

      i had a women science teacher ): she taught me how to say "you are a fat greasy gay" in spanish.
      tu eres una gorda gresa madicon.

  • @jazbinsek
    @jazbinsek Před 8 lety +1

    Great video! Great Lecture!

  • @shirleyjtni
    @shirleyjtni Před 12 lety

    Thank you very much!

  • @MrKorrazonCold
    @MrKorrazonCold Před 11 lety

    That makes perfect sense to me. Thanks!
    "Could all direction be curved multiplying+/-dividing 3-D spherical waves inbetween an infinite number of vorticies? And there is no space, or rather matter is just space when and where it is very intense in violent motion simulating rest and balance now through violent motion. These opposing vorticies spiralling outward seem to combine together and we have the Fibonacci sequence in objects of broken symmetry that can be seen almost everywhere in nature."

  • @topspeederalmond
    @topspeederalmond Před 8 lety +1

    Very nice. I have not thought or heard about galvinometers in a long time. Thank You

  • @axelbelleris
    @axelbelleris Před 6 lety

    Espero tener la suerte de emcontrar un profesor como éste, que explique así, demostrando cada fenómeno con experimentos. Qué apasionante. ¡Muchas Gracias por compartir!

  • @DukeLaCrosse20
    @DukeLaCrosse20 Před 10 lety

    The whole time he was handling all those tubes and (what appear to be) antique devices I was worried he was going to drop/break something. The ending of the first part was classic!

  • @omalrafa
    @omalrafa Před 12 lety

    this video is great!

  • @jaderoov
    @jaderoov Před 8 lety +1

    very beautiful and attractive way of explaintion

  • @UnknownSoul001
    @UnknownSoul001 Před 13 lety

    @iloveflyingac We can absorb the electromegnatic wave & change its shape but energy cannot be destroyed. EM wave is also form of energy. We can change its frequency by several ways. One femous natural phenomenon of change in frequency is "Doppler's Effect".

  • @daddy7973
    @daddy7973 Před 4 lety

    Nice demo.

  • @Differendramovies
    @Differendramovies Před 4 lety

    So great

  • @TheStarryboy
    @TheStarryboy Před 12 lety

    awesome stuff. My professor recommended it to me :)

  • @cksmaya
    @cksmaya Před 6 lety

    很棒的示範教學,我從沒看過這樣認真教學,謝謝你。

  • @MrKorrazonCold
    @MrKorrazonCold Před 11 lety

    'Space is a division of solidity into tenuity. Also a multiplication oscillating volume at expense of gravitational potential.
    Now matter in violent motion is simulating rest and balance through violent motion.
    In the future Heisenberg's limit will be required time cycle for quanta to exist. The interval of the becoming moment reaching its threshold when C is cancelled out by its anti+C, collasping and reforming+/-eXploding into this enomous collage of what we experience as the current moment.

  • @h2opower
    @h2opower Před 12 lety

    Nice example of Standing waves with the red light showing the anti nodes.

  • @Migueldeservantes
    @Migueldeservantes Před 11 lety

    I use a 5.8 Ghz transmitter and receiver! I fabricate new and more efficient antennas! Do you have any advice of what procedure of how to measure that output and specially the gain of different antennas? thanks in advance!

  • @davereid-daly2205
    @davereid-daly2205 Před 9 lety +1

    Briliant ! Really enjoyed the humor. Where were you when I was at school. Too many theory based teachers out there, these demonstrations really helped me, thank you soooo much...great work !!

  • @Dyslexic-Artist-Theory-on-Time

    Motion within an infinite number of ref-frames, based on just one equation (E=ˠ M˳C² )∞ the Lorentz contraction of space and time is between the energy and mass. The greater the energy the greater the contraction of space and the slower time will run. Mass will increase relative to this and each ref-frame can be seen as a vortex in space formed by the rate that time flows. The brackets represent the boundary condition of the ref-frame formed by the energy within infinity

  • @subbu2346
    @subbu2346 Před 11 lety +1

    Thank u

  • @sudhansumtripathy
    @sudhansumtripathy Před 12 lety

    Hi sir need the complete video lecture on the Electrical Physics, I would like to know at what frequency will a human being get electric shock and in an Induction motor do we get electric shoch if we touch the rotor. Please provide a lecture series on the tesla coil, antenna fundamentals and design of antenna and Electrical Machines

  • @tomshaa391
    @tomshaa391 Před 6 lety

    What kind of wave in the vacuum, how explaine TEM, phase ondulation of stationnary scalar wave space/time ...
    gabriel LAFRENIERE tell more about scalar field ...

  • @professorbhaiyyamotivation

    where can i find more of these videos
    link plz someone?

  • @lifecolor
    @lifecolor Před 13 lety +1

    25:20 = silly and lol.
    I did quite a few of these experiments in my Conceptuals Physics class. Thanks.

  • @TuscaniManiac
    @TuscaniManiac Před 14 lety

    gr8 vid thx !

  • @shirleyjtni
    @shirleyjtni Před 12 lety

    Can someone explain to me why the E-field can pass through the wire grid that's perpendicular to the E-field polarization? Thanks!

  • @CondensedComments
    @CondensedComments Před 5 lety

    3:01 There's a leyden jar, spark gap and voltage source, it's said the spark gap breaks down and you get ac voltage.
    How is the voltage alternating directions?

    • @TheSundaysLive
      @TheSundaysLive Před 5 lety

      The leyden jar and the spark gap create a pulsing current in the coil this gives a pulsing magnetic flux over the coil. When the flux is decreasing a potential difference over the coil is created which is opposite when the flux is increasing. This is called inductance and is responsible
      for the ac component.

  • @captkirkconnell
    @captkirkconnell Před 11 lety

    That's a Pass Professor. A+ Quality OK to distribute to Innovators.

  • @jasonsweet228
    @jasonsweet228 Před 11 lety

    what happens if you have a magnet core coil and you run electricity through the coil? Does it super-amplify the EMF field or shoot the magnet out of the coil like a bullet?

  • @JawwadHussainBhattti
    @JawwadHussainBhattti Před 12 lety

    Awesome i like it...

  • @Dyslexic-Artist-Theory-on-Time

    Good video!
    This is an invitation to see an artist theory on the physics of light and time!
    Based on just two postulates
    1. Is that the quantum wave particle function Ψ or probability function represents the forward passage of time itself quanta by quanta!
    2. Is that Heisenberg’s Uncertainty Principle ∆×∆p×≥h/4π that is formed by the w-function is the same uncertainty we have with any future event within our own ref-frame that we can interact with turning the possible into the actual!

  • @peterbonnema8913
    @peterbonnema8913 Před 9 lety +30

    The very best part: 25:20
    I laughed out loud XD

  • @iloveflyingac
    @iloveflyingac Před 13 lety

    hello, i have a Q if you can answer.. can we destroy or absorb the electromagnetic wave 10µ. or may be can we change its frequency or wavelength after it is transmitted on the way ??? please answer me...........

  • @sifisoradebe2471
    @sifisoradebe2471 Před 11 lety

    thanks a lot

  • @jayejayeee
    @jayejayeee Před 12 lety

    some sweet info here

  • @mplaw77
    @mplaw77 Před 7 lety +2

    Well done, interesting

  • @GeneralBB3
    @GeneralBB3 Před 13 lety

    So Cool

  • @h2energynow
    @h2energynow Před 5 lety

    Awesome

  • @adriangheorghe2327
    @adriangheorghe2327 Před rokem

    Asa zisele unde electromagnetice UE exista doar in conductori. In vidul cosmic, materializat de oceanul eteric, necoeziv, neinertial, inelastic si incompresibil, adica in oceanul materiei inponderale, nu poate functiona mecanismul undelor, care cere transformarea succesiva a unei forme de energie in alta forma. Sinfazarea campului electric cu cel magnetic in sanul undelor EM este dovada clara ca in vid mecanismul undelor nu functioneaza. Undele asa zis electromagnetice sunt doar niste reliefuri electromagnetice, constituite din circulatiile inlantuite ale campurilor elec tric si magnetic. Dupa descifrarea sensului fizic al constantei de actiune h se poate demonstra ca la nivelul fiecarei semiunde, forta electromagnetica propulsoare, este la echilibru cu forta de inertie, (BIl=m.a). Acest echilibru, face lunecarea (translatia) cu viteza uniform rectilinie, a structurii scalariforme a undei electromagnetice. Viteza uniform-rectilinie si structura periodica transverasala, dau aspectul de unda al radiatiei E-M. Dar radiatia E-M este doar o structura dinamica similara motorului electric liniar, care luneca prin vid cu viteza luminii, fiind propulsat de forta electromagnetica, forta care este la echilibru cu forta de inertie.
    The so-called UE electromagnetic waves exist only in conductors. In the cosmic vacuum, materialized by the etheric, non-cohesive, non-inertial, inelastic and incompressible ocean, i.e. in the ocean of weightless matter, the wave mechanism, which requires the successive transformation of one form of energy into another, cannot function. The phasing of the electric field with the magnetic field in the breast of EM waves is clear evidence that the wave mechanism does not work in a vacuum. The so-called electromagnetic waves are just some electromagnetic reliefs, made up of the chained circulations of the electric and magnetic fields. After deciphering the physical meaning of the action constant h, it can be demonstrated that at the level of each half-wave, the propulsive electromagnetic force is in balance with the inertial force, (BIl=m.a). This balance makes the sliding (translation) with a uniform rectilinear speed, of the scalar structure of the electromagnetic wave. The uniform-rectilinear speed and the transversal periodic structure give the wave appearance of E-M radiation. But the E-M radiation is only a dynamic structure similar to the linear electric motor, which glides through the vacuum at the speed of light, being propelled by the electromagnetic force, the force which is in balance with the inertia force.

  • @MrKorrazonCold
    @MrKorrazonCold Před 11 lety

    "Physics is easy!
    There are only two combinations of these spherical sine wave-front's. They have opposite vector's and spin forming the positron resonance input+0/1-output electron wave-front's concentrically layered like onion's compressing+4-0-4+decompressing eXpanding sphere's dissipating gravity dividing time symmetry, at the same ratio, information is being multiplied by surrounding masses generating electrical potential oscillating volume of mass at the expense of gravitational potential.

  • @Dyslexic-Artist-Theory-on-Time

    In this theory objects form their own time by slowing up the rate that time flows relative to their own energy or momentum. This is a process is universal from the largest planet to the smallest creature everything will form its future spacetime geometry by slowing up the rate that time flows relative to its own energy. This can be best seen in plant life in the form of the Fibonacci spiral being visible in almost every type of plant life

  • @omibuddyy
    @omibuddyy Před 2 lety +1

    I am surprised that the camera is still working!

  • @MrKorrazonCold
    @MrKorrazonCold Před 11 lety

    And when an object accelerates towards the speed of light away from an observer becoming redshifted. And Blueshifted in front of the object compressing the wave-amplitude the shorter the wavelengths this will increase the circular momentum of the waves and the gravitational force!

  • @engmahdi1418
    @engmahdi1418 Před 6 lety

    Can't wait #2 please release it as soon as possible 🙆

  • @rickwest2818
    @rickwest2818 Před 4 lety

    How to the magnetic field and electric field get in phase when they come off the antenna 90 degrees out of phase?

    • @schmetterling4477
      @schmetterling4477 Před rokem

      That's what Maxwell's equations are telling you.

    • @rickwest2818
      @rickwest2818 Před rokem

      @@schmetterling4477 I found the answer to my question. Equations are great for predictions but they don't always grant a mental image of what's really happening.

    • @schmetterling4477
      @schmetterling4477 Před rokem

      @@rickwest2818 No, but you can develop the mental images by reducing the equation to what is happening in each point. How does a changing magnetic field cause an electric field? How does a changing electric field cause a magnetic field? When are they both in equilibrium? You can do this graphically if it helps or you can evaluate it mathematically.
      Having said that, it takes a good amount of time to develop an intuition and I have to say that mine was never very good for the free em fields.

  • @Tricky1341
    @Tricky1341 Před 11 lety +1

    so in other words this video demonstrated that electricity and light could of been free to all

  • @taojiang719
    @taojiang719 Před 9 lety

    we can actually see induced noise on the tape recorded. once professor turned it off, it disappear. 5:16

    • @stabiljka
      @stabiljka Před 9 lety +1

      Tao Jiang I could see them on me telly

  • @Concienciafractal
    @Concienciafractal Před 12 lety

    Pido al que pueda que haga la traducción o el subtitulado en Español. Gracias!

  • @ferdyhoshigakitube
    @ferdyhoshigakitube Před 11 lety

    10:09, This Dude endure pain just to show us how Electromagnetic Wave works,
    Respect for you good Sir, repect for you

  • @salmonxia
    @salmonxia Před 12 lety

    where are rest of lectures?

  • @Tulay-uyma
    @Tulay-uyma Před 5 lety

    videolarınıza türkçe altyazi eklermisiniz lütfen❤ bilgi için teşekkürler💎

  • @ikaeksen
    @ikaeksen Před 3 lety

    25:23 No animals made out of glass was hurt in this video.

  • @Tom-pc7lb
    @Tom-pc7lb Před 2 lety

    At about the 15 minute mark, is that the HARP free energy experiment?

  • @ICEGTN
    @ICEGTN Před 11 lety

    Dipole antenna: what I don't understand is how can a magnetic field be generated if the circuit is open... because open circuit = no flow of electrons... -> confusion

  • @ronaldsykes966
    @ronaldsykes966 Před 11 lety

    nice,now lets step it up a bit,ok.the direct interaction with the plasma field with the specific interaction of metals from the carbon group,run threw reverse back to back thyristors threw a dual high voltage signal generator ,threw a secondary ionized gas field ,threw an inductor, 1 to 1, into a sound generator circuit so you can hear what you sound like interacting with the plasmas field threw a speaker. lol have fun take care ron

  • @nRADRUS
    @nRADRUS Před 9 lety

    once more, but with quantum explanation pls )

  • @JoeWilger
    @JoeWilger Před 9 lety

    25:15 to 25:30 - I think they used Foley sound...

  • @Afeqs
    @Afeqs Před 12 lety

    I wonder if the multiple bulbs were connected in series or parallel.

  • @suhaimiseliman8593
    @suhaimiseliman8593 Před 2 lety

    The TRANSMITTER 'S power is sufficient to accommodate the minimum signal requirement for all receiver ( coil/loop ) placed along HORIZONTALLY position glass rod.
    Red neon bulb lit with same brightness. 🤔😷

  • @Dr.HazharGhaderi
    @Dr.HazharGhaderi Před 14 lety +1

    25:22 haha so good :)

  • @hemsj02
    @hemsj02 Před 11 lety

    where is the second vid man ??????????????

  • @jamesof7seven
    @jamesof7seven Před 8 lety

    if I could understand this, I wouldn't need this

  • @nafishsarwar2077
    @nafishsarwar2077 Před 3 lety +3

    @10:00 Corona has lost all it's previous meaning, unfortunately.

  • @DHARMENDRAGUPTA-or6zw
    @DHARMENDRAGUPTA-or6zw Před 8 lety +25

    too much darkness in whole video u cant see anything vividly

  • @junbug20
    @junbug20 Před 10 lety +1

    Not exactly for the beginner, but great presentations of basics, very cool.

  • @schitlipz
    @schitlipz Před 7 lety

    Nice gizmos. Can never find a good explanation of the transition of near field to far field.

  • @airtechmedia
    @airtechmedia Před 11 lety

    You can see the electromagnetic interference slowly moving up in the each frame of the film as soon as he switches it on.

  • @ytrew9717
    @ytrew9717 Před 4 lety

    which pixel is talking?

  • @zachtgreen
    @zachtgreen Před 12 lety

    13:20 he changes the potential in his rod.