Your enthusiasm is contagious. Keep enjoying life. Nicely done!

I LOVE YOUR EVIL LAUGH, thank you so much for this video. I do HL IB Physics so this is great!

you are an incredible teacher voice color explanation and most importantly, fluency, it amazes me that u did that in one single take

The popcorn was good

7:44 golden moment

Wow your videos are unbelievably better than the crap videos they give me at my university. Thank you so much

Thank you so very freaking much. All of your videos are epic.

Love the enthusiasm. He puts fun in Physics more than Sheldon Cooper. :D

I love your enthusiasm!

"thats a dark fringe yo!" I LOVE THIS PLZ DONT STAHHHHHPPP EVER

This was perfect! The explanations were totally clear, absolutely nothing I did not understand. And the excitement was fantastic, too. I feel very well prepared for tomorrows period - thank you! = )

Mr. Schuster: Are you taking notes? Me: 👀 Also me skipping back to take notes: 😕 🤔

You are great .... You make physics very very interesting . ThanX Keep going

Thanks! Happy to help.

Well, my brain is now non existent!

Excellent video. Really helped me a lot. Thanks so much!

Thanks for deriving the equations- I've found that to be key for understanding physics!

REALLLYYYYY HELPFULLLL , THANK YOU !!

awww I like the cute little Newton doll at the beginning I want it. hah

"It's like you're in a conversation with yourself, and get interfered by a text that you sent your self" Love it! Thanks for bringing the humor to physics =)

Thank you so much Doc!! You’re amazing

this is hilarious, thanks for the laughs :))

You are amazing!:D

doc, this is the first video of yours that im watchin, and man , i'll tell ya. this video needs more views. your teaching is a reflection of the passion i have for physics. when the teacher is as excited as the kid, then ...well, its a party :D cheers.

u r a beaut teacher doc!!

love your videos!

I can't believe Benson went back to school to get a physics degree

6:30 the example made me laugh, thank you. I was not having a good day but this has brightened me :))

i like your funny style.. Nice work

I loved this lecture.

Great vid! Keep it up!

The way he said “goodbye”

seems when there is destructive interference we l get a dark spot and in constructive one bright spots with less intensity,so bright fringes,how are dark fringes ? are they having less darkness or less brightness.

Thank you so much! even though Im not good at English, I can understand from your drawings. really good and easy explanation.

thank you for this!

It's too chaotic for me.. i feel more confused then i was before 😅

im here sipping my lemonade and getting hyped as hell

i have some question when we divide the split into 4 split the wavelength should be h/4 not h/2 ???????? and my sequond question how a sigle wave is interfer with it self i can't imagine that ? do you have some video where i cant watch it ? i saw your Huygen's Principle but i don't get it 3) when do we have the case of 2 split and when we do have 4 split i just cant get it if the first wave interfere with the wave at W/2 and at the same moment it interfere with The wave at w/4 and give us 2 second dark postion ?

Thank you for this video! :) Subscribing

OH MY GOD THANK YOU SO MUCH SIR!

thank you so muchhhhh !

Do you still get interference when the wavelength is exactly the same length as the slit (W)? Huygens explanation states each source will produce wavelets that interact, but if there is only room for one 'wavelet' then how does interference occur? Seems to work with the maths also as if Wsinx=landa then sinX=1 when W=landa, which puts the first dark fringe at 90 degrees which is saying there wont be a dark fringe, just a light fringe gradually decreasing? Thanks for any help and for the video

single slit diffraction made me want to to cry

Thanks! I should really look these things up before I start, right?!?

if we assume that maxima are found at odd half integers of lambda, for example ø = 3Lambda/2a you can create that maxima by splitting a slit into three slits, slits 1, 2, and 3. so all the waves from 1 interfere destructively with the waves in 2, and only 3 contributes to the maxima at that point. if you have 5 slits, 1 kills 3, 2 kills 4, and only 5 contributes to the maxima, thus ø =5lambda/2a. does that make any sense?

When you "separate" the slit into 4, do the rays converge to a single point on the screen?!? And it represents a single dark spot?

i have a question .if the wavelength of light is very small,then even a very small distance matters right.then how can we assume parallel rays when we know there will be some extra path difference right and it could be comparable to lights wavelength.

I see what you're doing and I like it.

I wish my class were this fun...Thank youfor this!!

Hi Doctor, I have another question for you I suppose that you're dividing the slit into any number of slits, as many as you want, because of Huygens' principle. But you're only taking rays that are at a distance equal to the width divided by a natural number (w/n) to calculate dark fringes in their intersections (interference), at infinite. So you take two rays separated w/2 to calculate the first dark fringe; two rays separated w/4 to calculate the second dark fringe; and so on. The problem I find is: if you just move a little closer one ray to the other after having calculated the first dark fringe, then these two new rays will interfere destructivly just a little higher in the screen, producing a new dark fringe a little higher (the angle theta will not be very much increased). That would produce a totally dark screen, or maybe totally bright. Where is my mistake? It's hard to explain without a picture, and I know it may be hard for you to understand it too, but I hope you will. Thank you very much

Wow, thanks! I like you, too!

I am eating popcorn right now

Well, if one slit is two, then each slit is W/2 wide. Also, those two slits are W/2 apart from each other. So, yes, width is also separation, but neither is equal to the width of the real, physical slit width.

But what about the interference of rays from all the other positions on the two halves of the slit, that are not at a distance of W/2? I don't get it. You can form infinite pairs of rays from the two halves, but we just consider the ones who are at a distance of exactly W/2 (which are also an infinite number of pairs don't get me wrong). What is going on here? What am I getting wrong?

Geez... but I seriously am sitting here eating popcorn and not taking notes!

I love your enthusiasm when teaching. Really kept me listening with having to struggle to concentrate. I just have a question though, what's the point of treating the single slit as multiple slits? Is it just to get a better equation to use when calculating bright fringe width?

you are now my most favorite person

Please come and teach at my college. I love you, wished my professors had the same enthusiasm like you.

love how you put fun into your teaching.....i like the "fix you bow tie newton" line.....killed me

How do rays of light moving parallel to each other, and starting at different origins, ever meet on a screen and interfere? 8:05

Thanks for the help. I wish I was as interested as you in physics. I never do this when I study 12:12.

i was asking about condition and theory proof of bright fringes.........like u hv shown for dark fringes in this video.......................please reply

How are the bright fringes defined in the single slit diffraction?

how do you know that the second ray that is interfering is in the middle of the hole?

thanks sir it really really helped

If you said that any natural number of wavelengths can equal wsin theta. How did you get -1 wavelengths

Why divide the slit into powers of two? Why can't we split in into 3 parts or nine parts etc?

i love the title

great dude .........great explanation.😋😊😇

I never enjoyed physics that much that I did today

double slit exp gives different intensities at different points??? (the initial part of the video)

Diffraction is prominent when wavelength of light is large as compared to the object (small ball for example).In the slit experiment we say that if slit is small then there will be more prominent diffraction ,isn't the distance between the slits acts as a object here ?

Awesome another tutorial..

Why is when the distance between two rays w/4, the difference in wavelength is still 1/2? Shouldn't it be 1/4?

How do the rays interfere when they're parallel to each other? (At 8:04) I'm probably just being stupid but I just don't get it :)

What causes the bright fringes in between the integers of m

great vid

amazing.......thnks u really are my teacher.......:) love from me

Why couldn't we have done the same calculations for the bright spot? Or, let me guess, there are different ranges of bright rather than the one completely dead spot (dark) so we need more complex calculations to calculate it's position?

Why does is split in half and not in another quantity, such as 3 or 5?

very nice lecture

Where do the dots come from though?

wooh...its like studing from a frnd..! thanks doc

Hey man! Incredible video, first one of yours I've watched as I've been desperately searching for solid info on single and double slit light wave experiments. Tis people such as your self who have inspired me to go on to want to do much the same thing and teach physics at high school or university. The only things I don't seem to understand with all of this is; 1. If Huygen's principle says there's infinite points along a wave front from which 'secondary wave-lets' can exist, then why isn't there simply infinite interference? I don't see how the interference pattern can exist from this viewpoint. (I think someone asked this earlier, but I thought you may know now?). 2. At about point 8.20 in the video where by you talk about these two points from which light rays come out from, you say they're both projected with the same angle theta, but then interfere with each other a relatively large distance away. How would this work if they're projected on the same angle, and are therefore parallel? Unless by them being half a phase out means they're pathways change and meet later on? Cheers :)

Very good. btw, whole no. include zero @15:16

Why does the slit have to be divided into powers of 2? Don't any multiples of 2 work as well?

Mistake - whole no. Starts with 0,1,3.... Not 1,2,3.....

is this how cinema theaters work?

Great !!!!!!!!! you gave me many details

ARE YOU NINJA

You remind me of Jake Peralta from Brooklyn 99, fun listening to this

But he did stick needles in his eyes, so that's cool hahaha

Hi, I read somewhere that bigger satellite dishes diffract waves less, which causes the waves to be reflected onto a smaller focus. I'm not really sure what diffraction has to do with satellite dishes - does the dish behave like a single slit?

oh my gooooooddd single slit diffraction T_____T

Dear Doc: The doublé slit system has its own interference pattern, but each slit also has it´s own interference pattern. So, in the doublé slit experiment we have 3 interferences mixed right? (that is, slit 1 interefence + slit 2 interference + slits 1 and 2 interference). What is the final interference pattern for the doublé slit takeing in count the 3 interferences mixed together?

Thank you so much sir really u r incredible. I would have been more fortunate if you were my physics lecturer. Well here r few topics pls let me know if u can help me in these.....diffraction intensity equationdiffraction at circular aperture (Newton rings)absent spectra in diffraction

You make me love PHYSICSS...ur'e the COOOOLEST!!

why W/2 but not W or W/3 or whatever it is?

What about the bright points

"Come on dude, fix your bowtie."