Huygens Principle | He's Dutch! | Doc Physics

Every point along a wavefront is a source of a new spherical wave at every instant. If that makes sense, I guess you don't need to watch this. Go play soccer.

[@-homechord-2908]

I love how exited the teacher gets about this. It's really fun to hear.

[@ananyasampath827]

There's a serious need for more people like you in this world. I really admire your teaching skills.

[@Greengrasslife]

It makes it so easier to learn when a teacher is passionate. Thank you Sir!

[@mellygirl23]

"You see that a plane wave is actually made up of an infinite superposition of spherical waves." = my light bulb moment :) Thank you so much!!!

[@DocSchuster]

Good work. Most people just get overwhelmed by the beauty and power of his observation!

[@beentherelovedit9150]

same. i was like, theres jus something i dont get... it was this lol.

[@sagdamohamed2525]

@@beentherelovedit9150 ََ٨ وتاه ه ع ع جراحة صقر ص صث ب.. وقو٤د٩ب&#ح٠

[@typicaltoto]

I love how he is so passioned about this😂

[@essadababneh5871]

passionate*

[@shivanksinha704]

+Essa Dababneh spelling nazis...too many of them...

[@jcs9468]

I am dutch and you pronounce 'Huygens' differently indeed, but you're forgiven due to your teaching skills. The Huygens principle isn't part of my lecture I need to study but I like your video's that much that I study extra. You increased my interest! :)

[@DocSchuster]

jcs94 I've found that diffraction makes no sense without your fair countryman.

[@shivanksinha704]

+Doc Schuster DAMN.

[@theunitydev5418]

This is actually the best physics explanation i have ever seen

[@pupper6044]

This enthusiasm is what my professor in physics needs!

[@akhan1107]

I wish my teachers taught me with such passion and energy! Loved the explanation!

[@brunoserra94]

your videos are great! I'm watching this at like 4 am and you just keep me somehow always interested in the video wondering what cool things are going to happen next! you're a great teacher, thank you!

[@dieEinfachAnderen]

A better explanation than I've found in any book or website. Why do they have to make everything so complicated when it could be easy like this. You did a great job!

[@hayahussein74]

I was having a crisis understanding this and you saved me thank you !! And your way of teaching is just so much fun.

[@erikachao8915]

Ahahahah, I put this video on 2x speed and I couldn't stop laughing at the "WAVE FRONT WAVE FRONT WAVE FRONT"

[@clayhalk727316]

what ever

[@sanaalshaar6059]

​@@clayhalk727316 Why are you mad 4 years later?

[@user-pi8pd9wc5y]

@@sanaalshaar6059 3 years

[@JuiceBoxBoiii]

Thank you very much! It makes me really happy when I see someone enjoy physics as much as you do.

[@stevenrivas2852]

As an aspiring biology teacher, I love your enthusiasm and find a sense of inspiration from it. I am taking physics right now and you explain this topic great. Thanks!!!!

[@DocSchuster]

Steven! It will be great to have you in the ranks of passionate teachers. Get pumped, because you're going to save the world with me. Study hard.

[@MsCreeperPictures]

I wish my teacher was this interested in his own subject. Excitement surely is contagious.

[@alejandrobohorquezpeniche521]

This is beautiful, I'm a Queenslander studying Year Twelve Physics and your explanations do everything old mate Ms Matthews can't! Thanks a heap !

[@-homechord-2908]

+Alejandro Bohorquez Peniche Hey! Fellow Ozzie!! I'm from Perth! I'm a Perthlander? a Perthian? IDK. Anyway, good luck with your ATAR!

[@RevanthBoomBoom]

i thought Salman Khan was the best teacher, but this guy is just as good as him.

[@frizsid]

WOW. You are such a Passionate Teacher. You made us so excited about this FREAKING TOPIC. I didn't find it so interesting until I watched this video. 👏👏👏

[@stijnvh6383]

this made it finally clear!!! my physic ''teacher'' at the college of Ugent is so bad in teaching, he even couldn't make this clear! But he knows his stuff well, and is good in failing his students. I don't know how he didn't lose his job yet.

[@DocSchuster]

Yikes! That sounds awful. I'm glad I could help.

[@user-bw6uu3un9y]

most of the teachers know what they need to teach but dont know how to teach

[@vidyasagar-pr2ck]

the way u explain makes me attracted towards physics

[@sunshinelove7777]

something about him reminds me of ted mosby!

[@asafvirin2181]

you are the coolest teacher I have ever had the honour of listening to. Especially considering how boring most physics teachers are, I went from having no clue what the hell this was to completely understanding it in like 5 minutes.Thank you!!!!!!!

[@fairujict5463]

You're a Genius....and a WONDERFUL TEACHER!!!!!!.

[@jockellis]

My wife believes sound can go from the kitchen, sail through the living room and into the bedroom. Then it caroms off the walls and travels down the hall and into the bathroom. And then it travels into the shower stall where I’m washing my hair. And she believes I should hear it.

[@munj942]

This may be the most well explained version of this I have ever heard!

[@krishnochura05]

ur enthusiasm made me interested...! kids nowadays r soo lucky...! they have everythng in youtube...!

[@heidismith9839]

HUYGEN! I can't stop saying that! I also love at the end how he said... "buhbye"

[@sidp5101]

These videos legitimately help me so much more than my school classes

[@clareward619]

You just saved my physics grade! Thank you!

[@bookwormgirl000]

THANK YOU FOR ALL OF THESE VIDEOS! LOVE the enthusiasm

[@dunx125]

I love your style, keep it up!

[@Aekaay]

A great teacher...he exceeded just being mediocre teacher..love it sir

[@RevanthBoomBoom]

Love the energy man, 2 minutes into the video and it is 2 am here and i'm so attentive.

[@EditsbyNicole]

this is a really good video, bless your soul. the only thing i don't understand is how you determined where destructive interference is at the end?

[@DocSchuster]

You're really nice! Thanks! Feel free to tell your friends if this has been useful.

[@ivansossa6631]

Wow. Everything that I didn't understand about this topic you cleared up like it was nothing, Thank YOU!

[@princessrad111]

Ok so my teacher assigns me these videos for lectures and sometimes I just wanna get it over with quickly so I set it up at 2x speed... Holy crap I waste more time falling off my seat laughing each time...

[@DocSchuster]

princessrad111 Yes, I imagine that would be pretty crazy!!

[@oliviahoward3881]

princessrad111 i did that too! He sounded so exited at 2x speed lmao

[@anuragbiswas4476]

princessrad111 and when the speed is assigned to 0.5, he sounds lyk a drunkard! :P

[@rajaalahmar4371]

did he just really go around the corner???lmaoo i love this man

[@SisyphusOnSunday]

Damn..2 mins in and all my doubts were cleared. Thank you Doc!

[@upandatom]

haha hilarious as always

[@PhantomKThief]

Hey Doc I have a doubt, we say that light is made up of packets called photons which burst to give colors, now what makes light to travel as a wave?

[@vasavapr]

0:31 Wave front, Wave front, Wave front, Wave front... ... You sir are a legend. :-)

[@nehuenserafin6874]

i Love your energy and enthusiasm to Physics, excelent work

[@shohamsen8986]

Okay lets say you send a beam of light through vacuum. Then at each point, the beam will produce a new wave fromt by adding all its point sources, right. But from from the principle, its clear that therer are two planes of constructive interference, one in front of the wave and one behind the wave. So according to this principle there should be some light movong in the backward direction. Since its vacuum, this back propagating wave cannot be from reflected/scattered from any particle. So its quite an easy experiment to do.

[@chandrarishabh]

Finally, I get the real feel of Huygen's Principle!

[@gracenakamura5211]

This guy makes me so happy keep up the good work sir

[@Userr-w8k]

thank you for this video , i want to ask a question i found it in my book, what is a wavelet?!

[@eldarsehayek]

I'm interested to know something - Huygens says each point is a source of a new spherical wave. Doesn't it contradict the preservation of energy? I would imagine being a source requires energy, so if every points is a source all the time that means the wavefront carries an infinite amount of energy, which is not true of course. What am I getting wrong in this analysis?

[@DocSchuster]

Yes - very good question. The energy that would be theoretically required is not manifest because there is destructive interference in almost every direction. So energy is conserved. YAY!

[@pepe371]

5:48 bout gave me a heart attack....

[@DocSchuster]

Dank je wel!

[@swagdaddydiego6643]

Is there a principle about light affecting the color of tornadoes? They can sometimes appear white and then at a different position, they appear black. Or is that just light reflecting off of debris when one is black.

[@airsoftking777]

beautiful explanation! Thanks.

[@k-bear7707]

I REALLY wish your enthusiasm helped me understand this concept, but I think it's very important that you understand that REPEATING something DOESN'T equal EXPLAINING something. Good effort though.

[@kabrx99]

seriously man u r a very very good teacher...

[@abiiirshhh2542]

love how he's so excited 😍

[@MissFilmii]

You explained it way more exciting than the textbook! Plus I learned something! Cheeers!

[@muhannedalsaif153]

love your enthusiasm!

[@aquss33]

You really be yellin' at them waves. Amazing video!

[@mukund3499]

you r very good teacher you clear my all doubts about Huygens principle.....

[@pinkuswargiary9425]

really COOL.. . very well xplained

[@holy16henrik]

very usefull. Tomorrow exam and didn't found a good video about this. But now I fully understand. Thanks Doc!

[@kevinpatty119]

Great video love how enthusiastic you get ;)

[@laurentiusmichaelgeorge1118]

That WUOW on 4:26 Thank you very much Sir.

[@williamlowry8809]

The sum of wall the wave points on your wavefront is also constructive on the other side of it, so why doesn't your wave move backwards?

[@annalessing4288]

You really helped me out. Thank you so much!

[@dgreegmdz]

Very good, it was more interesting than the physics book I'm reading. Greetings from Mexico :3

[@makemdrougard4008]

We need more profesor like you

[@charem2284]

1809- Jean-François Chapollion took mild interest in the Rosseta Stone. 1814- Thomas Young began work on the Rosseta Stone as he loved the Greeks, languages and science. Fierce and heavily nationalistic competition between them to translate the stone- Young worked on it himself, but Champollion overtook him and may have stolen some of his early, fundamental work on hieroglyphics. 1821- Champollion actually read the first properly translated hieroglyphics despite Youngs tentative hieroglyph dictionary in 1819.

[@akshhay]

Is it necessary that width of slit should be same in all cases?

[@marutinandan9359]

i never understood it before...thanx a lot doc!

[@takshashila2995]

You need to be given a NObel prize for this!

[@xiaohanjiang4960]

So the wavefronts are formed whenever the two spheres intersect with each other

[@bijaysitaula7006]

I really felt difficult to understand this theory, but now really i understood quite more. still i need to focus. thanks

[@kushsmart5828]

Can I know why spherical wavelets do not follow law of rectilinear propagation of light ?

[@hannahwischralmathias6320]

I can’t understand nothing in my school about that! Thanks a lot professor. Hugs from Brazil ;)

[@md.arafatrahman2847]

my teacher told me he memorized it but i didn't give up and now i think u made me a boss

[@1996sagark]

How the hell you manage to be so enthusiastic in the vids? Lol Great Vid!

[@sazzadhossensakib8099]

Learning from Bangladesh. You are a great teacher.

[@johnc7214]

doesn't Hudgens principle violate the conservation of energy ????

[@DocSchuster]

Super question. The waves that cancel via interference have no energy and no manifestation in space.

[@chills3453]

What does it mean to have no energy? Dont waves transfer energy? Sorry, Im a freshman.

[@gauravkar4805]

Doc Schuster i beg to differ. The wave has energy it doesn't make any sense that an em wave has no energy. Well coming to the answer: During interference, the energy of the two or more interfering waves is redistributed. The energy that you think might be missing at points where destructive interference occurs 'goes' (so to say) to points where constructive interference occurs. Total energy is conserved.

[@0anniegrace]

If my prof teaches like this, I'll be excited to go to class always hahaha.

[@sadik.oagile6779]

5:50 😂😂😂 Chill out Sir

[@jorgearias3547]

Muy clara y apasionada explicación. Gracias.

[@DocSchuster]

YES! Go get 'em!

[@camdenndean]

Watching this out of context, can someone explain how he draws the orange lines showing completely destructive interference near the end? How do you know where the troughs and crests are when you can only see the wave front?

[@kebronzewdu1163]

Brilliant Explanation!

[@Vikram777ish]

Wow this helped me understand and remember better , Thank you sir . also lmaoooooooooooo the voice !

[@charlesoakley007]

This video is pure awesomness

[@aurelienyonrac]

A plain wave is an infinite superposition of spherical juxtaposition. It sounds like "A line is a one-dimensional figure that is made up of an infinite number of individual points placed side by side" except he said it one dimension higher.

[@Realist201]

Love the enthousiasm!

[@TheShooter1337]

You made this so interesting, thanks!

[@wxh2018]

In the video, you said that there is an infinite point sources along the wave front, so when they pass through a gap there is also infinite point sources that form the circular wave after the gap. But when I try to draw this on paper with a wavelength = gap, i dont get semi-circular wave fronts, instead i get a flat middle with edge rounded. Similar to picture below but isn't wavelenth = gap supposed to make semi-circular wave fronts? i.stack.imgur.com/9eH45.png

[@aishabhat5754]

Made it really easy for me to understand man! I feel so good....Thanks

[@devin6437]

The way you say Huygen pisses me off, but the tutorial makes up for it lol

[@rdrahul9444]

3:52 if there's a constructive interference then amplitude of wave should keep increasing but that's not the case sorry for my English

[@RishabhSharma-gm4cw]

I just need to ask something. i know im commenting after 3 years but still... Why is a point of a wavefront a new secondary source. Im asking why is it so? i mean you showed how. But why is it so. It would be huge favor if you could reply because i have a test coming up and it would be huge help.

[@x66girl]

I never saw someone so "happy" or "excited" likeyou with a wave interference. (:

[@elnora1469]

Great video, thank you! :)

[@mlvcfan]

Thanks I didn't get it till I Saw you draw it out for me. Very clear for me to understand.😁

[@Janmejoyslg]

Interesting and energetic. :-) Thats the way you make Physics entertaining!!!