What is an Electromagnetic Wave?

[@visasaarinen6051]

That was well explained. But in this example we had this charged particle which was oscillating and thus generated the oscillating E field we can call EM wave. But we get EM wave when ever charged particle is in acceleration don't we? So that it doesn't need to osculate? Is there a way to explain the emission of em wave in that case? Also a student of mine asked about the phase shift of 180 degrees that occurs in the Electric Field of a EM wave, when reflected from an optically denser medium. Is there an intuitive way to explain that or is it just pure math? Thanks in advance!

[@PhysicsMadeEasy]

Hello Visa, Question1 (acceleration of charged particle): Yes, we do, because accelerating the charge, will create a perpendicular disturbance in the field lines (thus a variation in the direction of the E Field). A variation of the electric field is radiation. A good visualisation is provided by this video: kzbin.info/www/bejne/q4elZHqVesmco5Y. And you can explore more with this inspiring simulation: kzbin.info/www/bejne/pXmaiIWBnNF-hM0 The second question was trickier (why phase change of pi). It is hard to avoid the post high school math here… and it is true that most lecturers explain that it occurs and when, but not why… You can roughly see it that way, by referring to the amplitude reflection coefficient Erefl/Eincident = r = (n1-n2)/(n1+n2). When n2>n1 the ratio of amplitudes is negative, implying a phase flip. More info here: www.usna.edu/Users/physics/mungan/_files/documents/Scholarship/PhaseChange.pdf Good questions! I hope my answers help you.

[@visasaarinen6051]

@@PhysicsMadeEasy thank you! This was exactly what I was looking for!

[@JL-fh4qw]

@@PhysicsMadeEasy When an electric wave oscillates is there a delay for when the magnetic field oscillates?

[@PhysicsMadeEasy]

@@JL-fh4qw Hi J.L., in vacuum , no there is not: the oscillation and of the E field and that of the M field are in phase.

[@Littleprinceleon]

@@PhysicsMadeEasy please, can you provide a suggestion for a somewhat in-depth but still intuitive source on fields (classical versus quantum)? Preferably in the form of YT videos. Thanks a lot. (I've tried Sean Caroll's Biggest ideas of the universe, but cannot put those pieces together in a more or less coherent whole).

[@zhe0ops]

I have to say this is the first time I am starting to understand what eletromagnetic wave is. Thank you.

[@tuckercoffin2164]

Omg same!

[@raphaelfrey9061]

You probably never saw eugene khutoryansky

[@sheiladefauw5292]

@@raphaelfrey9061cfg❤rrdr de😂drrrrrrre

[@sheiladefauw5292]

@@raphaelfrey9061😂tutu y he ftme

[@sheiladefauw5292]

@@raphaelfrey9061 w

[@supergirl1892]

This little video captured what miles of blackboard, chalk and textbooks couldn't. Thanks

[@PhysicsMadeEasy]

Hi SuperGirl, I am glad you enjoyed this video. Thank you for letting me know :-)

[@suhadalkhafaji8995]

Omg finally I found a professor I like

[@rajendrapatel9758]

Good

[@LightSaber77]

This is one of the most powerful explanations I have ever seen. Please make more videos.

[@PhysicsMadeEasy]

I sure will, thank you Bharath! There are many more on the channel. Feel free to explore!

[@billaday]

@@PhysicsMadeEasy , thank you !

[@gtfantafizzy1295]

Very humble, respectful and knowledgeable person. Thank you.

[@muhdibrahim8817]

How i wish i had a teacher like you in my life SIR.I love physics but graduated with a third class degree and still doing in teaching it in my locality nigeria. Thanks for the video my mentor.

[@PhysicsMadeEasy]

Hi Muhdi, thank you so much for these very kind words. All my wishes for a good continuation of your studies of physics, and also my best wishes of success in inspiring young students when teaching it! :-)

[@mahhh247h]

وتت انت عربي

[@imallrightwhosleft4832]

Thank you for rescuing me out of all the confusion on em waves. Your 3 minute presentation is worth the research of a lifetime. 🙏🙏🙏🙏

[@PhysicsMadeEasy]

Thank you so much Imallright. Some people spend a lifetime of research looking for complex things, which is good and useful for society. Surprisingly, it needs also a lot of time and teaching experience to present basic concepts in a pedagogical way while remaining rigorous... (I wished I had me when I was a student lol!)

[@richtaylor6039]

Just discovered your channel. Very enjoyable viewing. Love your style of presentation. New sub.

[@PhysicsMadeEasy]

Hello Rich. I am glad you enjoyed your visit to my channel. Thank you for you kind and encouraging words. You are welcome to visit again anytime :-)!

[@montasir0607]

This is the 1st video where I actually understoood EM wave and how radio works, thanks!

[@swellerpal2007]

i haven't imagined that i could be able to understand the electromagnetic waves but after watching this i feel its amazing

[@PhysicsMadeEasy]

It is, amazing isn't it! And often easier to understand than many textbooks would make you think... I lie in the title of my channel: Physics does not need to be made easy. It is already :-)

[@muhammadraqibulislamraqib8134]

Finally I understand the what is electromagnetic wave actually. Thank you Professor, May Allah Subhanahuwataala bless u.

[@PhysicsMadeEasy]

Thank you Muhammad for your kind wish. I am glad my video helped you.

[@kamariahrajainthiran1805]

@@PhysicsMadeEasy thanks for sharing your simple information 🙏👍

[@Byynx]

What a masterpiece of explanation. It's amazing how with a combination of videos we can understand great things.

[@PhysicsMadeEasy]

Hello Byynx, thank so much for your kind words. I am so glad that my work enlightens people on the wonders of our universe! Comments like yours make me feel like achieving my goals 😊

[@lanewilder912]

🎉❤😢

[@SupratimBhowmick]

This was by far the easiest explanation that I have encountered.

[@PhysicsMadeEasy]

I am glad you enjoyed my approach. Thanks for letting me know :-)

[@zhiyiwang6466]

For those wondering why the magnitude of E is changing: “Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time”

[@phoumint]

Thank you so much ❤

[@Lorenzo-zg3ct]

Question. How can it reverse directions?

[@frankdimeglio8216]

@@phoumint EINSTEIN IS UNCOVERED BY DIMEGLIO: WHAT IS E=MC2 is dimensionally consistent, AS TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE; AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE); AS the rotation of WHAT IS THE MOON matches the revolution. Indeed, consider what is the man (AND THE EYE ON BALANCE) who IS standing on what is THE EARTH/ground; AS touch AND feeling BLEND; AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE). Indeed, WHAT IS GRAVITY is, ON BALANCE, an INTERACTION that cannot be shielded or blocked. GREAT. BALANCE AND completeness go hand in hand, AS it all CLEARLY makes perfect sense ON BALANCE. Magnificent. By Frank Martin DiMeglio The sun's tide-generating force is about half that of the moon. One half times one third is one sixth. Consider what is water. The density of what is the Sun is believed to be about one quarter of that of what is THE EARTH. The diameter of WHAT IS THE MOON is about one quarter of that of what is THE EARTH. The density of the human body is about the same as water. Lava is about three times as dense as water. Pure water is about half as dense as packed sand/wet packed sand. We can multiply one fourth times two thirds in order to ALSO get the surface gravity on the Moon in comparison with what is THE EARTH/ground. The gravity of the Sun upon the Moon is about TWICE that of what is THE EARTH. The lunar crust is about TWICE as thick on the far side of what is the Moon. Notice what is the TRANSLUCENT AND BLUE sky ON BALANCE. The maria (lunar “seas”) do occupy ONE THIRD of the visible near side of what is the Moon. One half times one third is one sixth. What is E=MC2 is taken directly from F=ma, AS TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE; AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE); AS the rotation of WHAT IS THE MOON matches the revolution. Consider what is the orange AND setting Sun ON BALANCE. Consider what is THE EYE ON BALANCE. Consider what is the fully illuminated AND setting/WHITE MOON ON BALANCE !!! What is E=MC2 is dimensionally consistent. The land surface area of what is THE EARTH is 29 percent. This is EXACTLY between (ON BALANCE) what is one third AND what is one fourth. The maria occupy one sixth of what is the Moon. The BULK DENSITY of what is the Moon is comparable to that of (volcanic) basaltic lavas on what is THE EARTH/ground. Consider what are the tides. ONE HALF times one third is one sixth. ONE QUARTER times two thirds is one sixth. What is gravity is, ON BALANCE, an INTERACTION that cannot be shielded or blocked. CLEAR water comes from what is THE EYE (ON BALANCE). ON BALANCE, what is THE EARTH is ALSO BLUE !!! GREAT. BALANCE AND completeness go hand in hand. What is LAVA IS ORANGE, AND it is even blood red. Awesome. Yellow is the hottest color of lava. Blue is the hottest flame color. Note: Consider what is the blue flame. The lunar surface is chiefly composed of pumice. By Frank Martin DiMeglio In understanding SPACE, what is gravity, TIME, AND time dilation (ON BALANCE), it is important is it to understand what is a BALANCED displacement of what is SPACE. ELECTROMAGNETISM/energy is gravity ON/IN BALANCE. Consider what is E=MC2. TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE. Consider TIME AND time dilation ON BALANCE. (c squared CLEARLY represents a dimension of SPACE ON BALANCE.) Indeed, the stars are POINTS in the night sky ON BALANCE. The rotation of WHAT IS THE MOON matches the revolution. Consider what is THE EYE, AND notice what is the TRANSLUCENT AND BLUE sky ON BALANCE. NOW, consider what is the BALANCED MIDDLE DISTANCE in/of SPACE. CLEARLY, BALANCED inertia/INERTIAL RESISTANCE is fundamental (ON BALANCE). “Mass"/ENERGY IS GRAVITY. ON BALANCE, consider what is the orange (AND setting) Sun. “Mass"/ENERGY involves BALANCED inertia/INERTIAL RESISTANCE consistent WITH/as what is BALANCED electromagnetic/gravitational force/ENERGY, AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE); AS gravity/acceleration involves BALANCED inertia/INERTIAL RESISTANCE (ON BALANCE) consistent WITH E=MC2, F=ma, TIME, AND time dilation ON BALANCE. This CLEARLY AND NECESSARILY represents, DESCRIBES, AND INVOLVES what is possible/potential AND actual ON/IN BALANCE, AS ELECTROMAGNETISM/energy is CLEARLY (AND NECESSARILY) proven to be gravity (ON/IN BALANCE). Notice what is the fully illuminated (AND setting/WHITE) MOON ON BALANCE. Great. TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE. Indeed, inertia/INERTIAL RESISTANCE is proportional to (or BALANCED with/AS) GRAVITATIONAL force/ENERGY; AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE). This CLEARLY explains what is E=MC2 AND F=ma ON BALANCE, AS TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE !! (Consider TIME AND time dilation ON BALANCE.) Great. Indeed, consider WHAT IS THE EARTH/ground ON BALANCE. I have mathematically proven why the rotation of WHAT IS THE MOON matches the revolution, AS ELECTROMAGNETISM/energy is CLEARLY (AND NECESSARILY) proven to be gravity (ON/IN BALANCE). Consider TIME AND time dilation ON BALANCE, AS the stars AND PLANETS are POINTS in the night sky ON BALANCE; AS c squared CLEARLY represents a dimension of SPACE ON BALANCE. (Consider what is THE EYE ON BALANCE.) I have mathematically proven what is the fourth dimension, AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE) !!! I have explained why what are OBJECTS may fall at the SAME RATE. By Frank Martin DiMeglio

[@figefago]

@@Lorenzo-zg3ct You have to reverse voltage, assuming you have battery then change + with - and vice versa :) If you do it more more frequently then you have AC current :D

[@engineeringnerds16]

So far d most comprehensive explanation of electromagnetic waves available on Internet .....!!!! Thank you 🙏

[@PhysicsMadeEasy]

You are welcome. I am glad that this video brings a little clarity to so many!

[@sudds82]

This 3 minute video was enough for me to subscribe to your channel. Great stuff!

[@jonathanfriedlander8563]

That is the best explanation I have ever come across , any electrical tutor / electrician / teacher I have asked to explain this has been stumped . Thanks very much !!

[@PhysicsMadeEasy]

Hello Jonathan, I appreciate very much you letting me know. It gives me a boost of energy and encouragement when I read that I reach my goal like this :-)

[@lananhnguyen7415]

Wow. Thank you so much. I self-taught AP physics 1 and 2, and got 4 on both the exams, but I was struggling to grasp this concept for so long. You made it so easy to understand this. I wish I found you 2 years ago.

[@PhysicsMadeEasy]

a 4 in AP Physics while self taught. Well done! Thank you so much for the kind words!

[@lananhnguyen7415]

Thank you so much for the encouragement. Please keep up with your good work. That help students like me a lot.

[@nkosinathingwenyareacts]

NICELY DONE 😊😊😊❤❤❤❤ I AM HAPPY FOR YOU 👍🏿👍🏿👍🏿🙏🏿🙏🏿🙏🏿✌🏿✌🏿✌🏿👊🏿👊🏿👊🏿

[@Rocky_Jay]

You knew exaclty what to explain how to explian, most videos skip the basic parts and go straight into concepts living us in the woods without much explianing, but you sir knew exaclty what our issues where with this topic and you explianed it to us not as if we were fellow prefesors but as if we were what we are and that being students. THANK U KEEP IT :)

[@PhysicsMadeEasy]

Hello Helias, thank you for your kind words... You summed up why this channel exists: when I teach my real life students, I always make sure that the basic concepts I need to use are clear for them, otherwise, it can create or even crystallize confusion in their minds... I made this channel , focused on the basics, so that students can fly with their own wings...

[@tomatoeggs48]

Your explanation of the topic was so clear, I never thought I could understand it so easily! Thank you 😊

[@PhysicsMadeEasy]

Merci Celine :-)

[@Bhisma_official369]

Extremely underrated 😭

[@Sunnyk6631]

sir I can't thank you in words . ❤️❤️ I don't know why all teachers are not like you . my teacher explained me and whole KZbin explained me but I was not getting feel of this topic . I was able to solve em wave numericals but wasn't understanding what's happening in real . but now my all concepts are crystal clear. again thank you so much 🙏🏻🙏🏻🙏🏻💖. I have subscribed your channel and pray for millions of subscriber on you channel . ❤️🙏🏻🙏🏻🙏🏻

[@PhysicsMadeEasy]

Thank Sunny, I am super happy that this video helped you so much! Please keep praying for that milliion subs... It's quite a long way haha. It would make me euphoric though to know my work helped so many people !

[@TomarVader]

I'm brazilian, finally i can understand it, this is, learn how eletromagnetic waves are origninated. Thanks!!!

[@PhysicsMadeEasy]

Hi Tomas, then it means my video has reached it's goal. Thank for the feedback, it's motivating!

[@Potatomatoo]

Thanks a lot I never imagined it that way. You definitely made me understand this topic better. The relation between electron/change movement and light was just mind blowing!

[@PhysicsMadeEasy]

it is, isn't it? That's why I like physics! :-)

[@huntermaze9875]

1) Can you explain how the receiving antenna knows which emitting antenna to pick up. 2) How does the antenna "read" the electron, I figure something so small and fast would be hard to track precisely. If you could answer these that would be awesome! Great video btw!

[@PhysicsMadeEasy]

Hi Hunter, the receiving antenna actually receives all signals from all nearby emitting antennas. It is a small filtering circuit located in the circuit containing the receiving antenna that will select the frequency of interest thus the emitting antenna of interest (for example, with vintage radio receivers, the passing band of the filtering circuit is controlled by a rotary button). The antenna does not "read" one electron, but trillions and trillions that are submitted to the EM wave the same way (statistically, the evolution of the resulting current). I hope this helps!

[@hihi-qh3sj]

The explanation was superb! I learned a lot in a span of almost 4minutes than our 1hr class discussion. Thumbs-up! 👍👌

[@martinstubs6203]

@jacobchristner7129 Well you might as well start teaching the right stuff: No more magnetic fields, only electric charge.

[@saketupadhyay]

So short, crisp and to the point. Thanks teacher

[@PhysicsMadeEasy]

You are welcome... That's what I try to do: Make physics easy. Thank you for your kind feedback :-)

[@TheRoul273]

Indeed really well explained. I have seen a few videos on this topic, but you explained it the best! Well done.

[@maxheuser4968]

Wish we had these excellent, graphic learning-assist videos when I was doing electrical engineering at 'Varsity in the early 1970s

[@PhysicsMadeEasy]

Thank you Max for your comment, especially that I do the graphics myself (just using Powerpoint :-) ). Oh, and I agree. Sometimes I think that if I had access KZbin material when I was a student (late 80s, early 90s), my life as a student would have been much less painful, and I probably would have won a bunch of Nobel prizes since haha! Yet, the grass appears always greener elsewhere: I still wonder why the average level of young people in maths and sciences has been falling these last few decades (according to many statistics). It's quite counterintuitive...

[@stervingsolomon205]

Awesome explanation Sir, Hats off 🙏🏻😇 You did the explanation and theory in a calm manner , like not too speed not too slow.... Its quite fascinating...

[@mubinsaeef8529]

I just stumbled onto this video and i hope you never stop creating more videos

[@PhysicsMadeEasy]

Thank you Mubin for your kind words. It's true I haven't posted a video for a while: so much on my plate right now! But making new videos is the plan, so expect a burst of new fun physics videos when the time comes!

[@EmadNokandi]

Now I undrestand

[@ADITIPUROHIT.]

Bestest video ever made on this topic. Thanku so much sir!💜

[@PhysicsMadeEasy]

Thank you very much for your comment Aditi. I am glad you enjoyed the video :-).

[@sakibulhasan7697]

This was definitely amazing! I was looking for an explanation how electromagnetic waves work or travel, and this was the video that finally made me understand the whole concept. But here are some questions, the oscillating electrons create the oscillating electric field which results in EM waves, so does this wave go on forever? Does it not get weakened as it travels? If so, then does light get weaker too as it travels (Which I think yes)? And is that the same reason we see faded light when it comes from a distance? And how was the very first light created without an oscillating charge? Thanks a lot! Your videos are great, keep it up~

[@PhysicsMadeEasy]

Hello Sakib, - The oscillating electrons create the oscillating electric field which results in EM waves, so does this wave go on forever? - If there is no other electric field to disturb it on the way, yes it will. - Does it not get weakened as it travels? - In a purely static space empty of gravitational mass, no, it will not lose energy and go on forever. - If so, then does light get weaker too as it travels (Which I think yes)? - Light is the sum of rays. Each ray is an electromagnetic wave. A light source (or antenna) emits in all directions. Draw a point on a piece of paper (the source of light). Draw twelve lines going away of that point (in different directions). What you perceive as the intensity of light, is the concentration of these lines. You see they are more concentrated close to the source than when they are away… That is what you perceive as the weakening of light. But each line stays a line of the same thickness, each ray conserves its energy… - And how was the very first light created without an oscillating charge? - You mean at the beginning of the Universe? Charges were there before light (electric charge is a conserved property).

[@sakibulhasan7697]

@@PhysicsMadeEasy Thanks a lot! This explains my question~

[@user-11528]

Nicely explained. My Physics teacher never said about this.

[@LECityLECLEC]

I love your work! thank you for making Physics not just easy but cool!

[@Thisissharonnnnn]

Very simple short and concise

[@architchitre7867]

Hands down the best explanation! Thanks...

[@aalerasul5382]

Only now I understand the EM wave

[@Narendra_modi354]

Sir, I understand very well thank you so much have a good day❤❤

[@PhysicsMadeEasy]

Hi Abbasi, thank you for your feedback. You too, enjoy your day, and if you are a student, good luck with your studies!

[@stellinasofiffi]

A charge, placed at a given point in space, will generate an electric field around it. The strength of that field at a given position is represented by a vector. The magnitude and the direction of the vector represent the magnitude and the direction of the force that would experience a positive charge of one coulomb placed at that position. Imagine a metallic bar and focus on one of the electrons in the bar. This electron creates an electric field around it. Then connect the bar to a source of alternative current. The electron will move back and forth in the bar, with the current, it will oscillate, and so will the direction of the electric field the electron generates. The Y component of the electric field strength vector is oscillating and it can be represented by a cosine or sine curve. A changing electric field generates a changing magnetic field, so the oscillating of an electric field always generates a magnetic field that oscillates too. Suppose that I choose for the AC current a frequency of oscillation of 10kHz, this means that the electrons oscillate 10000 times per second, and so it does the electric field it generates. Imagine now that I place another metallic bar in the oscillating electric field. The electrons in this bar will feel an oscillating force because they are in an electric field and they will start oscillating too. We transmitted a signal through space, this is how radio works. We have 2 antennas, the first bar is emitting the signal, the second bar is receiving the signal. When the oscillating electromagnetic field is generated by the first bar, it propagates through space at the speed of light. The oscillating electromagnetic field is what we refer to as an electromagnetic wave (EM-wave). If we increase the frequency of the AC current up to 10 million Hertz, the result WM wave is Infra-Red radiation. If we increase the frequency up to 10 quadrillion Hertz, the metallic bar starts to glow now, it emits visible light.

[@sandeepbishnoi5398]

The best explanation I have ever got for EM waves Tnku professor

[@PhysicsMadeEasy]

Thank you for your kind words. I am glad my work helped you :-)

[@mangopomelo4994]

Does this mean that a man grabs an electric charged stick with 1PHz swinging by hand can emit light? Awesome.

[@PhysicsMadeEasy]

Yes it is. But you can even go further: You don't need to hold an electrically charged stick... Your arm too contains electrons, so if you swing it at 1PHz, it would start going also. Still I recommend you don't try... it is probably not too healthy to do so ;-).

[@gurmeetgrewal8709]

​@@PhysicsMadeEasy😂

[@SC-rb2jr]

Very easy to follow but very informative.

[@jopan7022]

Complicated concepts made easy! Great job!

[@hamzamohamed7935]

This art in explaining physics thankyou😊

[@samikshapandey295]

I must say this vdo is quite short and at the same time informative too along with an intuitive understanding 👍

[@PhysicsMadeEasy]

Thank you Samishka :-)

[@EgbeCliffordNgashu]

Well explained, had difficulties understanding this phenomenon previously

[@PhysicsMadeEasy]

Hello Egbe, so my work has reached its objective then! I am glad I was able to help!

[@sawindersingh4878]

oscillating force of oscillating electric field of emitters electron displaces the electron of receiver continuously which cause oscillation of receiver electron And thus work is done by emitter electron on receiver electron and as we know work is transfer of energy Great 👍 keep it up and upload more videos your physics is beyond from this universe you are amazing 👏 You prove physics os love ❤ 😍

[@PhysicsMadeEasy]

Thank you for your kind comment Sawinder :-)

[@DanEmino]

This was great. I love a short, precise explanation!

[@PhysicsMadeEasy]

Hi Dan, I am glad you liked it. Thx for the feedback :-)

[@deepakmarathe7347]

Well explained! Thank you

[@PhysicsMadeEasy]

You are welcome Spammer :-)

[@rajatbangarwa1367]

Thanks Dude what an explanation wish you always be young and keep making physics easy 😊

[@PhysicsMadeEasy]

Thank you Rajat... I used to be young haha! But I am not that old either, so I should still be around for a decade or two :-). And this channel keeps my brain young and powerful :-)!

[@zwnrcc]

It took some time for me to process it but I get it now! Thank you very much!

[@PhysicsMadeEasy]

You are welcome. I am glad my work helped you learn something new :-)

[@diyvideojunk2066]

Excellent explanation, thank you

[@troymartin6942]

You made it so easy to understand

[@jk_ilyu]

thank you for this amazing video explanation sir !!⚡💡

[@justarandomdude.9285]

Science is mind blowing!! 🧑‍🔬

[@PhysicsMadeEasy]

It is, isn't it. Once a student starts getting it, he/she can become irremediably hooked!

[@jackson-aka2gs749]

Great example and explanation. Great work, thank you.

[@PhysicsMadeEasy]

You are welcome, I am glad it helped!

[@keithangriffin-nm4jh]

Beautifully explained.

[@muhittinselcukgoksu1327]

Thank you so much. What a nice presentation of electromagnetic wave.

[@PhysicsMadeEasy]

You are welcome, and I am glad you liked it.

[@sweetblues3230]

i like short explanation and I like this how you explain understandable way❤

[@PhysicsMadeEasy]

Thank you Sweetblues for your Sweet feedback :-)

[@HassantlaisHassan-nz4ts]

Though I watched your videos now, as a physics student who always has questions, my dream is to communicate with you doctor. I hope I will achieve my dream and ask you doctor, with my all respect to you❤️

[@PhysicsMadeEasy]

Hi Hassan, you can always check out my tutoring website to know how it works (physics-tutor.nl/), but I have to tell you that my teaching agenda is currently full for the next few months...

[@Antonio-bc2ue]

Amazing video! Thanks for your work!

[@BhathiyaFernando]

Thank You for this easy to understand explanation..

[@AHalo2019]

Ooh i didn't know about that i always wondered why light want to travel in roller 🎢 coaster way . Now i know its a graph only E vs T . Thanks .

[@PhysicsMadeEasy]

Hi Tokyo tales, If you fix a position and look at the E field at that position while light passes through it, you will indeed get a sine curve (the x axis is time). But you also get a sine curve when you fix time (you take a picture where the x axis is position). The influence of the oscillation of the charge on the surrounding electric field travels at the speed of light. This is why depending on the distance from that oscillating charge, there is a delay in how the electric field changes. In other words, you also get a sine curve for light when the x axis is position.

[@venujohn9362]

For the first time I got a clarity about electromagnetic wave

[@PhysicsMadeEasy]

Thank you for letting me John. It encourages me to read your words!

[@phoumint]

Thank you so much for this amazing video. Now I have a base understanding of how electromagnetic wave works.

[@PhysicsMadeEasy]

Great Mint, I am glad I could help

[@phoumint]

@@PhysicsMadeEasy I want you to know that You are an amazing teacher ❤.

[@narniabusiness7810]

Awesome video as always!

[@asmaakadry6535]

Keep going fav physics teacherrr❤

[@abhisheknagar5909]

Great explanation

[@siddharthkr.4523]

Wwow.. really physics made easy.. thank you very much sir..

[@smallmoe2931]

Thank you for the explanation, sir. Definitely sharing this video and channel with my friend.

[@PhysicsMadeEasy]

Hi Moe, I am glad you enjoyed it and that it was useful to you!

[@snigdhamohanty9228]

Got a clear picture of what em waves are! Thank you!

[@PhysicsMadeEasy]

You are welcome Snigdha, I am glad my work clarified this concept for you.

[@amarbadran5699]

Thanks too much I am from Egypt this is the first time I understand how how lamp works and antena

[@PhysicsMadeEasy]

Hi Amarbadran. I am glad you enjoyed the video and that it helped you understand how an antenna works. Please note that this is not exactly how a standard lamp works... the concept in the video works for low frequency EM waves like Radiowaves or microwaves. But if you tried to do this with visible light, although conceptually correct (it is the acceleration of charged particles that generate light), other phenomena would come into play and the experiment would not work. If you want to know how light is emitted by the sun or by a light bulb, check my videos about black bodies.

[@amarbadran5699]

@@PhysicsMadeEasy I will see it thank you for making physics simple and interesing

[@indivitrongaming]

REALLY LIKED THIS EPIC EXPLAINATION SIR. LOVE FROM INDIA❤️

[@vanshitameena5844]

Loved it. Clearly explained in such a short span!

[@PhysicsMadeEasy]

Hi Vanshita, thank you for letting me know you enjoyed the video :-)

[@MrSolainathan]

well explained. Science shall be made easy

[@PhysicsMadeEasy]

... because approached / explained the right way, it is!

[@paultaylor4358]

Amazing explanation!

[@hemalpatel9005]

nice video, no one has explained me electromagnetic waves this easy.

[@PhysicsMadeEasy]

Thank you for your comment hemalpatel, I am glad my approach was useful to you.

[@newlinks883]

Thanks, great explanation

[@tashavoicer42]

Sir.....it was my doubt.,clarified today

[@suhassuha3174]

Very nice video sir. Even I am not in physics background I love to watch your videos in my break time

[@PhysicsMadeEasy]

That's wonderful Suhas! Physics is a fascinating topic when you get the basics. I am glad that you see it as a hobby, and that it provides you intellectual breaks in your daily life :-)

[@pierreretief]

This is excellent, thank you.

[@janhabipatra9177]

Great video sir 👏👏

[@dhrubajyotidaityari9240]

Very nicely explained. Thank you.

[@PhysicsMadeEasy]

You are warmly welcome

[@realizeislam4820]

Best explanation

[@QQ-nd3qq]

Dude, this video was awesome! Well done! It gave me a greater understanding of what light is. Now if you really want to blow my mind, explain the role of photons in this. When that bar in the example is emmiting visible light in the electromagnetic spectrum, is it also emitting photons? And does that mean....as far as particles go...infrared also produces photons....and even radio waves produce photons?

[@PhysicsMadeEasy]

Hi QQ, in this video, i remain in the framework of classical physics that sees light as the propagation of the oscillation of an electromagnetic field. In quantum mechanics, light is viewed as a flow of particles called photons. These photons are like tiny pieces of energy, like localized pulses, which have thus a frequency and a wavelength (E-h* frequencyf=hc/wavelength. that frequency or wavelength has the same value as the one that shows up in the classical description of light. So yes, visible light is made of "visible" photons, infrared is made of "infrared" photons and radiowaves are made of "radio" photons.

[@QQ-nd3qq]

@@PhysicsMadeEasy Wow...thanks! My mind is blown! Now I'm wondering if photons are just the intersection of two different electromagnetic waves with the same frequency....

[@pezhmanes]

Increasing frequency means increasing alternative count?

[@PhysicsMadeEasy]

frequency is a number of cycles per second, so if you mean by "alternative count", the number of oscillations of the electron per second, yes.

[@JamesTaylor-ng1zt]

I love the way he says cosine 1:10

[@davidmitchell0722]

This was cool af. Thanks for posting!

[@arpit02]

You literally made it easy 🌀

[@PhysicsMadeEasy]

Thank you for letting me know that my channel is reaching its goal :-)

[@Greebstreebling]

I failed A- Level Physics in 1972. I found the level of abstraction was very demanding. 'Using Newton's equations of motion, explain how a horse can pull a cart along a horizonatl track'. I felt there was 'Something Deply Hidden'. Give me one of Sean Carroll's multiverse wave functions any day....

[@PhysicsMadeEasy]

June 1972! I was just one year old then, so obviously I do not know how the A-Level exams were at the time. But today, this type of question still exists. It's a bit of a late advice, haha, but what I usually say to my students taking A-Level Physics is to work on many past papers in order to understand the A-Level exam philosophy and its pattens. Yes even if you have a good abstract understanding, it may not be the one they want to see (i.e. no specific 'marking' keywords in your explanation), and you could end up with a fail. There is a way to answer these questions and get full mark, and this is attainable by 'learning the exam'. Thanks for the reference to Sean Carroll's. I didn't know about him so checked him out, looks super interesting. Is he a modern Everett? I am ordering a book to check it out thank to your comment!

[@hikhik2205]

Thank you for this information.

[@aibasonbhuyan3512]

Thank you sir short and sweet

[@siddhartharajputsingh]

As a electric engineer .....i subscribed ....

[@PhysicsMadeEasy]

Thank you, the fact that a peer scientist enjoys my content is much appreciated!

[@jaihind9281]

Your channel is worth 1 billion subscriptions.

[@PhysicsMadeEasy]

A billion? That's 1 person out of 7 in the world... haha! If 1 person our of 7 would be the kind to enjoy physics (= making efforts to understand how nature and our universe works), the world would be a much more peaceful place :-)

[@somarajanrajesh4086]

What a video sir. Fantastic.

[@PhysicsMadeEasy]

Thank you Rajesh!

[@zuhaibakhtarkhan]

thanks ! sir first i was wondering for a lecture on electromagnetic waves like this but found nothing effective , when i saw your lecture i understood .

[@PhysicsMadeEasy]

Thank you Zuhaib! I am glad it helped you!

[@RoseMarieJamesJr]

That was spectacular!