Dude this is the best explanation of how electromagnetic waves are emitted. You killed Yale and Stanford . . . . A big thank you from an engineer who uses this stuff on the daily and now understands it better!!
This is only repeated story without thinking. Antenna is reactive part of system , and all science story is wrong. Is impossible to have max value E and B field at same time, also current and voltage. Ok, we use horizontal plane to represent B field , but that do not have any sense with phase shift, only with interpretation. Write new diagram, with B min at point of E max and that is correct. Only book with that presentation is correct, but maybe only few contain valid picture.
+ Electrical Disturbance - I think you are correct: Why should B be in phase with E? I thought the B field exists only for the stationary observer who feels the E field changing. The maximum rate of E field decay is felt by the observer when the slope of the E "wave" is steepest, ie when the wave cuts the x-axis; Am I right? So, at E=0, the B _should_ be Max. Therefore, E and B _should_ be 90° out of phase. Why do all textbooks show them in phase? What am I missing?
Robotix Sir I have one don't if an accelerated charge produces electromagnetic field, we can see the power transmission lines carries accelerated currents then in that case the electromagnetic waves should travel long distances and induce current in all the conducting material around that lines should induce current like as EM waves from antena induces in receiver antena. Please clear this dout
@Electrical Disturbance re:"Antenna is reactive part of system , and all science story is wrong. Is impossible to have max value E and B field at same time" . I will submit, ED, that the folks who researched direction finders in the 1920's onward have some idea about the E and B field phase relationship. I suggest you check out "Direction and Position Finding by Wireless" written by Ronald Keen in 1922. Here is an online source: archive.org/stream/directionandpos00keengoog#page/n6/mode/2up
It always bothered me as a student that how it physically happens and your video helped me understand that. Thanks a ton sir, your fun way of teaching makes learning a fun experience :)
I LOVE this explanation of electromagnetic waves. It uses my previous knowledge of the right-hand rule to intuitively explain how EM waves are created and propagated, which is very interesting! Thank you so much.
This is a beautiful explanation! I've struggled with understanding Maxwell's Equations on an intuitive level for what feels like forever, and now I finally feel a bit confident on the topic. Thank you so much!
Incredible video......I have been in radio communications my entire work life, and that's the best explanation of RF propagation I have ever seen! Great job, keep them coming! There's a lot more I need to know!!!!
I was so surprised when you mentioned Slovakia. I live there and sometimes it seems like it's a place forgotten by the world. It made my day. Keep the great work up!
Guys, do me a favor and don't question his awesomeness lol. The doc's good at promoting healthy INTUITION. When you do it mathematically, things might be somewhat skewed, but his presentation was on point. :)
Great video. Thank you for actually spelling out how these systems interact with each other, and explaining the physics behind it. A lot of videos on signals are either wayy too specific or wayy to general.
Dude...or should I say sir, your explanation is the best on youtube...you were able to deliver this boring topic coming up in my test using humor(grade8), intelligence and most importantly..with absolute simplicity....cheers! Many thanks..like
Great explanation for such great concept! I used to draw that E/B propagation wave when I was at uni, as I was a shortwave fan (dixer) it made sense to me and I got it right so far. but here the UNLOCKING piece was the timeline and and the Electric field move while a new one is generated at the source. that explains why a source cannot be a constant electric generator, unless you want a single pulse at the switch-on/off step. Brilliant! new subscriber indeed!
I suppose so. And you're right - it's hard to imagine a source that doesn't have ANY linear portion at the output. But maybe it's a shielded cable where the signal is coaxial with the ground... Either way, no antenna means extremely inefficient broadcast. This leads us back to an impedance matching discussion. Fun!
subscribed.... You sir are a rockstar. you love this stuff and I appreciate the time that you put in this small video. your manner of teaching has cleared up years of confusion in just under 15 minutes. absolutely lovely!
Finally I have found true explanation of those sinusoids. No YT channel pay attenention to question fwom where they getting from. But now I got it. Thanks a lot :-)
He also hit upon a major fallacy of "science." The meter used to be defined based on the length of a single metal rod at a certain temperature. All other meter sticks were made to fit that length. It was a unit of measurement based on a material. Then they decided that light has a "constant velocity" and used the fastest measured "velocity" as the constant, which occurred when measured in vacuum. Then they re-defined the meter to be based on the "velocity of light" while still claiming light has a constant velocity in vacuum. The problem with this is that light does not have a "constant velocity", even in vacuum. The rate of electromagnetic induction (erroneously called velocity) is determined by the magnetic permeability and dielectric permittivity properties of the medium through which the waves are propagating. There is no perfectly homogeneous medium in the entire existence of nature. The vacuum is not a perfect vacuum. There are various atoms floating around in different concentrations in different areas of space. Sure the difference between the actual rate of propagation and the assumed rate of propagation is minute enough to where it is irrelevant at short distances, but when cosmological scales come into play, this error becomes magnified. The truth is, our distance measurements on the cosmological scale are truly undeterminable because we have no way to determine the variations of the medium between the observer and the object being observed. We measure the time it takes for an em wave to propagate to and reflect back to the observer and then used the "constant velocity of light" to determine the distance. It is funny how we actually utilize time to measure distance. Further complicating the matter are erroneous interpretations of redshift, which can have several causes; not just the doppler effect.
Great question. Their amplitude is in strength of field. Only waves that have physical media have an amplitude that can be measured in distance. Nice work!
I'm so happy to hear it. I'm sure when I get to synchrotron radiation, you'll be well beyond that, as well. Maybe YOU should make the video... Keep learning!
This is great. I wasn't planning on watching a video on Antennas but it randomly autoplayed and well.. not disappointed in the least. Love your enthusiasm and eccentric speaking style while explaining the topic. Kinda of hilarious while informative. *thumbs up and shit*
Dude this is the best explanation of how electromagnetic waves are emitted. You killed Yale and Stanford . . . . A big thank you from an engineer who uses this stuff on the daily and now understands it better!!
Agreed, one of the better explanations available
This is only repeated story without thinking. Antenna is reactive part of system , and all science story is wrong. Is impossible to have max value E and B field at same time, also current and voltage. Ok, we use horizontal plane to represent B field , but that do not have any sense with phase shift, only with interpretation. Write new diagram, with B min at point of E max and that is correct. Only book with that presentation is correct, but maybe only few contain valid picture.
+ Electrical Disturbance - I think you are correct: Why should B be in phase with E? I thought the B field exists only for the stationary observer who feels the E field changing. The maximum rate of E field decay is felt by the observer when the slope of the E "wave" is steepest, ie when the wave cuts the x-axis; Am I right? So, at E=0, the B _should_ be Max. Therefore, E and B _should_ be 90° out of phase. Why do all textbooks show them in phase? What am I missing?
Robotix Sir I have one don't if an accelerated charge produces electromagnetic field, we can see the power transmission lines carries accelerated currents then in that case the electromagnetic waves should travel long distances and induce current in all the conducting material around that lines should induce current like as EM waves from antena induces in receiver antena. Please clear this dout
@Electrical Disturbance re:"Antenna is reactive part of system , and all science story is wrong. Is impossible to have max value E and B field at same time" . I will submit, ED, that the folks who researched direction finders in the 1920's onward have some idea about the E and B field phase relationship. I suggest you check out "Direction and Position Finding by Wireless" written by Ronald Keen in 1922. Here is an online source: archive.org/stream/directionandpos00keengoog#page/n6/mode/2up
The fact that you take the time to do these videos and share them reflects the great character you must have! God bless you sir!
This guy makes physics so much fun! :""D
I laugh while learning, that's a plus.
i wish all my professors sounds as enthusiastic as you, it helps a lot listening through the whole thing. And great content! Thank you!
Resonance. I have a video on it. Get ready to fall in love with the universe all over again.
Thanks for the props, too!
👁⭕👁
You know what surprises me more about you is the time you take to share to all of us orphans of mother science !
One thousand thanks !
Marcos Rivas That's a nice turn of phrase! You're welcome!
OMG, you explain this so well that I even got emotional after watching this. THANK YOU so much!
It always bothered me as a student that how it physically happens and your video helped me understand that. Thanks a ton sir, your fun way of teaching makes learning a fun experience :)
I LOVE this explanation of electromagnetic waves. It uses my previous knowledge of the right-hand rule to intuitively explain how EM waves are created and propagated, which is very interesting! Thank you so much.
This is a beautiful explanation! I've struggled with understanding Maxwell's Equations on an intuitive level for what feels like forever, and now I finally feel a bit confident on the topic. Thank you so much!
YOU'RE WHAT'S RIGHT IN THE WORLD! I never thought I would laugh and actually enjoy learning physics. THANK YOU
ME TOO!! I NEVER LIKED PHYSICS,BUT THIS GUY NAILED IT!HE SOUNDS LIKE RYAN REYNOLDS IN DEADPOOL HAHHAHAHHAHA
@7:30 "This pissed me off a little bit."
Sums up how I feel about everything I've learned in physics thus far.
learning EM waves has never been so exciting..Good explanation full of coherence and humor. THANK YOU
I love how enthusiastic you are!
Great video.
Greetings from Slovakia!
Are you on the West side?
This is the best explanation of electromagnetic waves I've found on youtube. THANK YOU VERY MUCH!!
Thank you for making these videos for us; they're tremendously helpful for university physics!
I have pumped almost every video out there to properly understand how propagation works , by far this is the best explanation ever !
This is how i imagine Scott lang teaches physics to Cassie😊 you're amazing
I knew all this already (more or less) but you still deserve a like for the presentation. Well done. Never lose the energy you have.
Incredible video......I have been in radio communications my entire work life, and that's the best explanation of RF propagation I have ever seen! Great job, keep them coming! There's a lot more I need to know!!!!
His reasoning is incorrect.
@@amirq25ify omg don’t say that! I’d hate for all those billions of radios around the world to suddenly stop working!
I was so surprised when you mentioned Slovakia. I live there and sometimes it seems like it's a place forgotten by the world. It made my day. Keep the great work up!
+Tomi Adamec Oh, what a horrible feeling! Happy to help!
Simple and entertaining, just as school should be. Man, must it be so tiring to entertain while lecturing! Thank you, you earned a subscriber
Guys, do me a favor and don't question his awesomeness lol. The doc's good at promoting healthy INTUITION. When you do it mathematically, things might be somewhat skewed, but his presentation was on point. :)
Great video. Thank you for actually spelling out how these systems interact with each other, and explaining the physics behind it. A lot of videos on signals are either wayy too specific or wayy to general.
For years....I have tried to understand EMW. This video creates that understanding.
I'm so happy to hear that! Thank you!
Probably the most entertaining video I have seen in months! Thanks for creating this, now I understand :)
Dude...or should I say sir, your explanation is the best on youtube...you were able to deliver this boring topic coming up in my test using humor(grade8), intelligence and most importantly..with absolute simplicity....cheers! Many thanks..like
AWESOME. makes me want to spend my life getting to know all this weird stuff.
Great explanation for such great concept! I used to draw that E/B propagation wave when I was at uni, as I was a shortwave fan (dixer) it made sense to me and I got it right so far. but here the UNLOCKING piece was the timeline and and the Electric field move while a new one is generated at the source. that explains why a source cannot be a constant electric generator, unless you want a single pulse at the switch-on/off step. Brilliant! new subscriber indeed!
4:44 "Strange because of diarrhea" Like wuuuut Scoob!!!! Lol
I enjoyed it, one of the best I've seen.
Awesome. I am so happy you are doing this! My students are going to love this when I tech EM next fall. Thanks.
Saying hello from the great country of Slovakia.
+Šimon Šimonn My son just said, "SLOVAKIA!!!" Yay!
What's something like great in Slovakia.. it's not ex ussr state
@@jitendranihaliya5677 former yugoslav however
@@tord1508 So what yogaslavia was not great empire ..
very nice lecture.. very well explained. Congratulations
I suppose so. And you're right - it's hard to imagine a source that doesn't have ANY linear portion at the output. But maybe it's a shielded cable where the signal is coaxial with the ground...
Either way, no antenna means extremely inefficient broadcast. This leads us back to an impedance matching discussion. Fun!
Many thanks for the very interesting and fun way of explaining EM waves. DANG!
I wish all of our teachers were this much exited .
Thanks for letting me know, Tom! You're welcome. Keep up the hard work.
Im from Slovakia and you made my day with this one :)
YAAAAS thank you so much for this, I've always been kind of not okay with EM waves, because like what's moving? What's making a wave? and now I know.
I LOVE your energy! This has been so fun
Holy shit! You just made me understand how antennas work! Thank you sir!
subscribed.... You sir are a rockstar. you love this stuff and I appreciate the time that you put in this small video. your manner of teaching has cleared up years of confusion in just under 15 minutes. absolutely lovely!
datz a mindblowing explanation! wow! have been always wondering about em waves but never got it ryt.
indeed this video deserves more views.
Your explanation is RAD! keep up the good work
love your explanations you make it so simple and so appealing !
This guy is awesome.
i m from programing field, but developed interest in this... ur videos r super cool.. subscribed.
Finally I have found true explanation of those sinusoids. No YT channel pay attenention to question fwom where they getting from. But now I got it. Thanks a lot :-)
Sweet explanation. I get it now. Thanks for posting
A very cool video. I love your (slightly mental) delivery
Clear explanation, thanks.
Wow. Never saw a light radio explained so well ;)
Best lesson I've ever learned in my life, I feel like a kid again.
Nuf'said! Excellent video!
Wow thank you very much. I have been wondered about this for soooo long!!!
Great! Great! Awesome explanation! Thanks!
The way you explain Doc
Dang
Just awesome
Love you👏👏👏👏👏
He also hit upon a major fallacy of "science." The meter used to be defined based on the length of a single metal rod at a certain temperature. All other meter sticks were made to fit that length. It was a unit of measurement based on a material. Then they decided that light has a "constant velocity" and used the fastest measured "velocity" as the constant, which occurred when measured in vacuum. Then they re-defined the meter to be based on the "velocity of light" while still claiming light has a constant velocity in vacuum. The problem with this is that light does not have a "constant velocity", even in vacuum. The rate of electromagnetic induction (erroneously called velocity) is determined by the magnetic permeability and dielectric permittivity properties of the medium through which the waves are propagating. There is no perfectly homogeneous medium in the entire existence of nature. The vacuum is not a perfect vacuum. There are various atoms floating around in different concentrations in different areas of space. Sure the difference between the actual rate of propagation and the assumed rate of propagation is minute enough to where it is irrelevant at short distances, but when cosmological scales come into play, this error becomes magnified. The truth is, our distance measurements on the cosmological scale are truly undeterminable because we have no way to determine the variations of the medium between the observer and the object being observed. We measure the time it takes for an em wave to propagate to and reflect back to the observer and then used the "constant velocity of light" to determine the distance. It is funny how we actually utilize time to measure distance. Further complicating the matter are erroneous interpretations of redshift, which can have several causes; not just the doppler effect.
Cool and precise!
Great presentation!
I loved every second of that! DANG
Great question. Their amplitude is in strength of field. Only waves that have physical media have an amplitude that can be measured in distance. Nice work!
very impressive！thank you so much!i finally learned the EMW. wish you have more videos ! expexting!
I'm so happy to hear it. I'm sure when I get to synchrotron radiation, you'll be well beyond that, as well. Maybe YOU should make the video... Keep learning!
I love your enthusiasm!!!!! THANKS>> I LEARNT ALOT!!!!
Another terrific video, thanks!
Awesome explanation! Thank you.
Really well explained, funny at times too :) keep it up
i really appreciate you doc!!!thanku shooooooooo much for this!!!
Amazing video!
Yep. Synchrotron Radiation. We typically don't mention it in the first year classes, though.
The best explanation ever, happy to discover your channel. Job well executed
Awesome explanation man! Great Work!
Dude, this is so well presented
yay, you used slovakia :) btw love your videos, they really help with things i only kind of understood in highschool and need to understand fully now
Thanks, best explanation ever!
man, thanks so much. I learned and laughed so much.
Very interesting way of teaching. Congrats professor.
Thanks for the video!
this is actually amazing thank you so much
This is great. I wasn't planning on watching a video on Antennas but it randomly autoplayed and well.. not disappointed in the least. Love your enthusiasm and eccentric speaking style while explaining the topic. Kinda of hilarious while informative. *thumbs up and shit*
awesome man....
Thanks! Your channel looks great, too. I did a fair amount of proton NMR for my thesis.
That's how the freaking physics is taught! Wow! You're a genius!
you are awesome teacher ..
thank you ;)
Insane teacher... Really enjoyed!!
Thank you for sharing.
Thanks, yo! Keep on learning.
Fantastic explanation
Excellent !
How does the current move down??? Its for a school project.
your cool way of deliver plus the information within makes this an informative and relaxing video.
Man you have talent!! thanks this helps me a lot!
Almost none of this is my own insight, but I'm really happy that my style is helpful for you! Keep rocking!
The magnetic field goes around the antenna experimentally. The sideways pointing magnetic field atrocity probably started in 1888 by Oliver Heaviside.
Great way of explanation
great video!
Subscribed right away!😄💗
Best explanation!
Love from India. .❤❤❤😊