Interference, Reflection, and Diffraction

[@mariamomar9694]

Am I the only who ALWAYS sings along with the intro song?! It's so ICONIC! Makes me excited for the video.

[@temisola2163]

you’re not 😭😭😭

[@zafroo5042]

Mee too 🤣😁

[@venkateshchakrahari5832]

Count me in 😅😅

[@christine1401]

you're not alone 😆😆

[@emiliehannibal2895]

oh my gosh!!! thought I were the only one

[@thomascal3401]

From Calc 3 to Physics 1a, nice to watch 5-10 minute videos rather than 30. Thank you prof Dave

[@lucapetrescu6990]

Thank you Physics Jesus

[@movpod5901]

Literally looks like Jesus lol

[@z3nkin]

@@movpod5901 so you're telling me jesus is a white man.

[@reman3000]

@@z3nkin no of course he's fucking blue

[@Aethelhadas]

i sleep lol

[@faritcaart9273]

Prophet of juses love

[@illuminatedslug]

my man’s is gonna have the last supper after this LMAO

[@ARCSTREAMS]

rofl

[@retsepilemothepu1396]

My Physics improved from 50% on semester test 1 to 97% on semester test 2🎉🎉 Thank you sir, I have nothing to offer. I’ll thank you properly in the future.

[@raniahabbas85]

Wowww good job 👏👏

[@evilsassypsyche11]

Wow! That's amazing! Remember to thank yourself too as you remember what you learnt! Memorizing is hard (for me).

[@brenomunoz9588]

¡Gracias!

[@hadeerrashad5486]

thanks a lot professor Dave for your amazing video!

[@Aurelia03118]

I got one of the best science explanation channel... ✨ Appreciation from India🇮🇳...here's ur one more student😊🙏🏻

[@330MillionGods]

2:22 when the wave is opposite phase and both waves are travelling in *opposite* direction , waves do not cancel out each other but they form a stationary wave. Waves will cancel out only when they are traveling in *same* direction.

[@ahmedatifabrar7698]

They may cancel out each other. Please watch Walter Lewin's lecture on Resonance. Standing wave is the net result we behold. But the waves cancel out each other between the positive maximum and negative maximum amplitude (think of a fundamental frequency wave).

[@skld-xm]

No? They cancel out during the standing wave phenomena when they overlap. Also since these are single pulses they will never converge again so no standing wave emerges.

[@G.L.Unraveling]

I can not tell you enough, how much I appreciate your videos! Love the comprehension at the end.

[@sandroca18]

I loved this explanation! Thank you! It opened my mind to so many things. I meditate for the last 5 years, and I have heard so many videos about our body frequency, how to raise our vibration, how we interfere in each other with our energy. Why we like some people right the way, while others, we do not like. And now listening to this video, I start to think, we are atoms, energy, we are waves and particles at the same time, so we interfere with each other creating constructive and destructive waves. It blowed my mind to understand us in terms of physics, in a microscopic level. Also there are so many videos here in you tube of healing music to heal all kinds of emotional and physical disturbances, to decrease anxiety, lower blood pressure, improve sleep, etc, music affects us with its sound vibration, and the vibration of songs interfere in the water of our bodies.

[@耔函周]

Can't stop laughing 🤣

[@asif-uz-zamankhan937]

Thank you sir.... Respect from your online student from Bangladesh!!!! May God bless you sir.... অসংখ্য ধন্যবাদ স্যার, আপনার প্রতি রইলো শ্রদ্ধা। সৃষ্টিকর্তা আপনার ভালো করুক।

[@moshiurrifat6935]

😎😎😎

[@rifatkhan192]

bangladeshi here brother.

[@gursikhichannel7282]

First best video on YDSE I ever found on youtube. Thats great.

[@emaanasif4481]

Thank u Professor Dave

[@itsmaryam3378]

By far the best video

[@mirtyunjaytharu1181]

1. Constructive interference 2. Destructive interference

[@Rahuljoshi008]

right!

[@horsebiscuityt6135]

Super useful, thank you!

[@kindiyyyalashari]

A very easy and concise explanation, thank you Sir.

[@gopikrishnank1956]

Nice video sir...very helpful...Thanks you..

[@arjunbabumabuhang4056]

Thank u sir. Love from Nepal😍😍😍

[@aakankshaojha6810]

Np❤

[@tamannagoyal8385]

Too informative,easy to understand....thanks for such video

[@islamhany6986]

Thanks a lot professor Dave!

[@RezaNoorzehi-r5h]

thanks a million professor Dave!

[@danielmacfarlane4575]

Thanks Dave this was helpful and short.

[@sebastian7494]

Thanks a bunch, Professor! You are awesome

[@animeshkoyande4934]

thank you professor

[@thayhuongchuyenhoalekhietq6803]

Excellent, Prof. Dave

[@windyzanele3813]

thank you professor you are amazing from high school till varsity ✊

[@brandonalcera]

Thanks I had a quiz on this this morning, really solidified my understanding

[@downandout9753]

succinct yet clear. He's seems to posses a deep understanding of the subjects; which I hope I'll someday achieve.

[@marq6325]

He’s literally jesus

[@abdulyusuf6458]

Prof u'a actually amazing. U clarify in short time marvelous. Buh it gonna if u can attach calculations

[@gachaami9542]

Thank you so much!

[@Gk_1234-t2z]

Thanks sir😄 Your One more subscriber Love from India 🇮🇳.

[@thehyperbolicintegral]

Sir, you are a great help!

[@dharnalapallamraju2654]

Respect you sir from andhrapradesh(india)

[@Whyulookingbruh]

Wtf why are u telling us where ur from

[@Champagne_confetti00797]

Thanks Dave😊

[@jordango6716]

Amazing tutorial!

[@PovaSlemani]

Thank you too much professor Dave i understood now😊😊

[@mark270five]

0:39 “Because of a thing called physics” -LeMillion

[@princesslucillaa]

thanks again 😊

[@dodatkidominecrafta4762]

you're much better than tutorials in my native language

[@ahmedalrafi500]

Awesome video 👍

[@FantasticFanta227]

Constructive interference and destructive interference 5:28

[@puppalasisira]

This topic is interesting, explanation from dave sir is much more interesting. Thank you sir

[@swapnilpatil8117]

Very helpful🙏🙏🙏

[@itsfarhan5480]

Thank u Professir Dave. Love from KSA

[@yogawithcarlos]

I'm not being picky, just trying to learn. I thought difraction was pronounced 'dee..' as in DI-ferrent. thanks for the video

[@theaveragemegaguy]

I believe it is. Not dyefactrion like he says it

[@richasharma864]

Nice teacher

[@Kylin-x7h]

It's amazing.... clearly explained everything in just few minutes .

[@thamaraithenral.b22]

And you are very good in teaching sir and I like it very much🎉😊

[@razasyed575]

amazing explanation

[@teosticea2388]

You sir. You are a legend.

[@roschelledimentman2768]

thank you so much! i just learned a ton in just a few minutes

[@luckyprosperity6408]

love this explanation better than my prof's

[@henrikpedersen533]

Mega god Video, elsker dine videoer babe

[@tamia8040]

U are a life saver ❤

[@БаянурДжороева]

Thank you(:) You are great phisician-teacher😊 Videos are 👍

[@mohsinali534]

With due respect its physicist not physician! :-)

[@Matescium]

Great explanation

[@blueckaym]

1st) In the case of destructive pulse interference, when in the segment where the two pulses interfere destructively what's the thing that causes each pulse to continue on its way? I know it happens, but I have no idea why. If I try to think about it there's a segment where the two pulses energies were destroyed, so it seems like they shouldn't be able to propagate after that. It's the same with constructive interference of course, but in that case at least there's the energy in the twice-as-high peak that would carry on the momentum. But what carries the momentum in the case of destructive interference? And 2nd question ~ 4:34 you mention diffraction of a wave thru a slit. You also mention that the produced (circular) diffraction is kind of interference pattern, but if the diffracted circular wave still only have uninterrupted sequence of peaks & valleys isn't it just a wave that just spread its propagation direction (just like a stone in a lake produced circular waves). But the main question is, in a simpler case - light in vacuum meets not a slit, but just one edge (imagine it like the razor's edge in Schlieren photography) light would still diffract on that edge and would start spreading in circular direction behind the obstacle ... but why? Also isn't the slit scenario just a case with two (close) edges diffraction, and the interference that we might observe is the interference between the two produced circular waves (with centers offset by the distance between the edges)? And if so, isn't the spread of light behind a narrow slit just the effect of that diffraction (& interference) and not (as many people claim) caused by Heisenberg Uncertainty Principle - that making the position of light more precise (by narrowing the slit) results in higher spread of its momentum? If the HUP people are still correct, then how would you explain the light from a nano-laser? I see currently some of the smallest nano-lasers are between 50 and 150 nm, which is considerably smaller than most slits used in said demonstrations. Certainly having the position fixed several times narrower would produce even higher spread of light? ... but it doesn't. My whole point on the HUP-aspect of light thru narrow slit is that it's a produce of diffraction on obstacles and not result of us knowing anything about it. If you really think about it, we KNOW that a light in a beam is made of many, many photons travelling in coherent linear manner. Hence if we just select to consider one of these photons in the whole beam we know it'll travel in straight line (if it doesn't interact with anything else), so how would that precise knowledge (about a position of a photon) cause it to spread (w/o hitting anything and travelling in vacuum)? I know of the described phenomena, I'm just trying to understand them as much as possible. Thank you!

[@sumboi5036]

Thank You

[@angeliemaebonaobra4448]

Professor Dave! THANK YOU!

[@dhyanlunechiya8738]

Great content

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Hi, I've got some amazing news that you'll be thrilled to hear!

[@AmitVerma-mi9rj]

U are very good in teaching.

[@SameerSk]

Many many thanks sir

[@waqasayub5803]

Very helpful tutorial this video clear all the confusions i face in these topics :)

[@AzizbekAbubakirov-g3b]

Thanks very much

[@hillvspray5266]

Physic: matters can't overlap Footballer: ah ah I don't think so

[@princesjhaufiku]

Thank you, God bless you 💕

[@PovaSlemani]

Iam watching you from kurdistan bravo master ❤❤❤❤❤

[@KJ7JHN]

Hey Dave, could you please explain the resonance propogation of a bell, or other non uniform object please?

[@KJ7JHN]

Thanks.

[@hamnakhan9298]

It would be awesome if you also went thru newtons method for calculation of the speed of sound and laplaces correction!!!

[@mayarzamzami]

thank you physics king

[@thehitmanhimself6794]

He explained it better than any other teacher out there

[@zinneerahsalim2964]

Thanks sir🙂

[@g.hrishikeshsrichaitanya6c538]

Thankyou so much sir

[@ramshresthgope]

Thaks sir

[@jared7_313]

Pov: exam is tomorrow

[@Aarinmahala]

Exam is tomorrow morning and it 1:02 am I fuck my self on this yt channel o***** completed

[@filmsy1721]

Thanks Avi

[@BADGAYAN]

He is the best.

[@AL-le7nr]

THANK YOU professor

[@mananwashere]

THANK YOU SO MUCH

[@gooddeedsleadto7499]

When amplitude adds up is it not called resonance?

[@perceptionshare2248]

Great video. Thank you for sharing your perception.

[@jsourceror56]

Gotta play the intro at least twice.

[@janelsamuels8411]

Thank u so much sir

[@جراحأنا]

great work bro😘

[@OLUWAMAYOWA.]

wowwww! Thank you!

[@jikkujose4235]

thanks a looootttt very very usefulll

[@Khgxcji]

Respect you sir.From Pakistan. :)

[@jesslyn5081]

Professor Dave can u record a tutorial explaining optics (ray diagram , thin-lens&magnification) ?plsss I need u

[@abdulkalamabdulkalam2624]

Very thankyou sir

[@codedaily365]

wheres ur modern phy course? i was here for difraction part only

[@samanthakeilyn5927]

You saved me I don't know what to say Tom but now I know thank you so much

[@ayahal-athwari8631]

dave

[@rajns8643]

Thnk u sir, very good video

[@madshaberstroh3170]

nice vid bro

[@sonalisarkar4525]

Thank 's sir

[@gooddeedsleadto7499]

Which headphones provide complete destructive interference or 100% noise cancellation? I recently bought the Bowers & Wilkins PX7 S2 from Costco. With noise cancellation turned on, it works well for reducing sound when using a vacuum, but the vacuum noise is still slightly audible in the background. Do these headphones offer complete destructive interference? If not, which headphones provide 100% noise cancellation or total destructive interference? I’m keeping them because I like them; the sound quality is excellent, and even with the vacuum cleaner on, they perform well. I’m also curious-if I were near a high-speed centrifugal compressor, would they be able to cancel out the noise?

[@blade7067]

Top G

[@hadishandai1182]

thanks