I'm a 49 year old undergraduate student at UC Berkeley. I don't have a background in the sciences so have to work a little extra when it comes to filling in what I don't know... I really, really needed this lecture presented in exactly this way. Extremely engaging and beautifully organized. Thanks so much!

The way u explained the LARMOR FRQUENCY exemplifies ur ability👌👌👌

Thank you so much sir !! U just made my day !! By making radiophysics understandable

I just wanted to thank you for the video - you explain things in a very phenomenal way - made it so easy to understand. thanks!

Feels like i'm in church.. good lecture

@goddestroyer3416

4 жыл бұрын

Haha I can see why you said that. 😂

@MikeEnergy_

3 жыл бұрын

Saviour

A wise teacher like you can really help all students out there..!! hatzz off Sir..!!

Thank you, for repeating yourself so I had time to mentally store the new information somewhere in my mind in such a way that I can understand it, process it, and retrieve it. In a classroom, I wouldn't be able to fall asleep, which is a normal process that happens when new information is stored, I can deal with verbal hammering as it created the interaction that keeps me alert during the start, middle, and end of the speech. So, although un-natural, I do find this method of teaching very effective for my way of learning. Thanks. That said, my understanding of resonance is some small force applied to an object that will respond to that frequency and begin to react due to this force and frequency. Thank you, I had no idea that resonance can effect; nor the effect be useful with either nuclear or magnetic methods.

Thank you for your effort to explain such a difficult phenomena. And I have a question. Does the earth magnetic field has an effect on spin of the proton and so it is considered that protons are oriented naturally to magnetic north pole?

Absolutely brilliant description of MRI. I actually understood every aspect.

Thank you for this lecture, it has helped clear a few things up that I was unsure of in Medical Physics.

Thanks for all your efforts, really helped me, simple and clear :)

wow, what a talent. thank you!

Excellent explanation in a well organized , simple way. Thanks a lot 👍🏻

You're awesome my man! Much appreciated really!

Great lecture, thanks a lot!

I logged in specially to like your video and say thanks for the clear explanation :)

Literally Best teacher I've ever seen...

Wan to be a lecturer like u..confident n good at explanation!

Thanks for helping me understand what’s going on in my quantum class

eautifully explained, the genius!

Thanks, I admire your work

The fact that my dumb self is getting what nmr is with my poor English skills is awesome thank u sir it's a chance to have you on this platform explain complicated things to commoners like me 🙏

Thank you so much Sir there is no any KZread channel as AK You are great sir

Thank you so much, great explanation as always

omg...i just subscribed to this channel just by only 1 video!

This is pure gold

Very clear explanation. ....Superb👌👌👌

It was very useful .. thanks

So I think I understand precession now! Thanks!

beautifully explained. thank you!😊

Many thanks! It was a really clear explanation

amazing video .. more than helpful

Hi, great lecture! Could you also explain to me the role of population differences (Boltzmann distribution) in nmr signal? And how does FT-NMR work, how can we get all the frequencies in one pulse? ty :)

Aamazing! Great help.. thanks!! :)

excellent explanation for beginners

You have a really hot voice , good explaination !

U r my super hero..

This was sooooo very helpful! Complicated subject, but totally makes sense now! Thank you!

Thanku, explained wonderfully

Excellent sir

Perfect explanation! Thank you!

@AKLECTURES

10 жыл бұрын

Thanks! Happy to hear it helped!

Thank you so much for this sir.

Thanks for your great videos. I have question. is the external magnetic field is stable or oscillatory wave? I confused when you explained procession concept, you used oscillatory external magnetic field. but later you show the external magnetic field as a positive upward (stable) vector. It is appreciated if you help me to understand it.

@nandakumar.s4028

6 жыл бұрын

Seyedeh Samane hi, actually there is a mistake, I think! the magnetic field in uniform and along a single direction. The sinusoidal wave (that u got confused for magnetic field ) is a the representation of radio wave. To summarize, initially there is a magnetic field to orient the dipole moment along with the magnetic field and there is this radio wave of particular frequency used to bring about the chemical shift. hope I was clear!!

please enable Subtitles submission so that I can help you with translation

VERY GOOD TEACHING. VERY USEFUL LECTURE.

Hihi nice video! But could you explain when the spin state is 1/2? Thanks in advance！

You state that the magnetic moment of a proton is 2.8 times the Bohr magneton muB. Correct me if im wrong but shouldnt it be the nuclear magneton muN instead?

So when somebody gets an MRI done, looking for something wrong, they can see if something is where it shouldnt be because its chemical shift would be different than normal cells? Hope my question makes sense...

Best scientific channel on the Internets!

@AKLECTURES

8 жыл бұрын

haven't seen you post in a while, welcome back :)

@dannyholley

8 жыл бұрын

Thanks! I've been so busy with coursework this semester, but rest assured that I've been watching and up-voting as usual! :) This video resonated with me (pun intended) because my great uncle Steve was involved in NMR research as a physical chemist many decades ago.

I love u sir. ...great great help ......I wish I could ever talk to u...

Awesome video!. I have a question: how can a proton have infinite current loops while proton itself is single entity?. If the charges are producing such loops, does that mean each charged particle has its own loop?. Thanks

@sr33dhar

6 жыл бұрын

As far as I know, this part is actually wrong. The magnetic moment is a consequence of the proton spin (just like an electron spin) which is an inherent property of the proton, just like its charge.

thank you!!

good lecture

V. Good. Can you please upload something about 2D nmr?

Little bit shouty but very clear. thank you:)

awesome mowesome

Thank you sir. :)

God bless you

thanks a ton :)

What does frequency of the nucleus means?

Sir ,how to distinguish between benzene and naphthalene using NMR Plzzz reply...

What is the relevance of the Larmor frequency to NMR?

Life saver

So the energies of a nucleus will split into a parallel and antiparallel direction. How exactly does that happen? Do you mean that some nuclei will be parallel and others will be antiparallel?

@omarleyva931

7 жыл бұрын

Is this a physical split?

What is rf pulse ,is this combination of magnetic and electric field

Subhan Allah wa bihamdihi , Subhan Allah Al 'Adim

Sir... kindly explain the Nuclear Resonance Scattering (NRS)

Please tell me which gas are used NMR

Everything is fine, but I have only one thing to concern about: *IF a "Spin up" nucleus torques less than a "Spin down" one, why they split with the same amount of transition Energy (instead of different proportions) from the same degenerate energy level?* Thanks for the explanation anyway 🤓🤙

Hi, I have a question regarding the magnetic dipole moment. If the current is negative, shouldn't it be moving clockwise for the magnetic dipole moment to point downwards? ...or am I wrong? Thank you for making these very useful and informative videos, by the way! :)

@AKLECTURES

9 жыл бұрын

Hi! You're welcome :) In the lecture, since we are dealing with protons and protons have positive charge, we only looked at the positive current moving in a circular fashion. The right-hand rule, which is used to determine the direction of the magnetic dipole moment, is applied for positive current. If the current is negative and moving in the same direction, we can still apply the right hand rule but we have to switch the direction we obtain from the right hand rule at the end. So in this case, if the negative current was moving in the counterclockwise direction, we apply right hand rule and obtain the direction to be upward. BUT because it was negative, we have to switch the direction of the magnetic dipole moment, so that means it points downward. So to answer your question, a positive current moving counterclockwise points creates a magnetic dipole moment pointing upwards. A negative current moving counterclockwise creates a magnetic dipole moment which points downward. However, a negative current moving clockwise would in fact create a magnetic dipole moment pointing upward. Hope that helped.

@spamgebob

9 жыл бұрын

Thanks! I get it now! :)

super video!

@AKLECTURES

9 жыл бұрын

bundeligafan thanks! :)

Ak sir

Is NMR the same as MRI?

nmr for for increased spontaneus termal fission??

Sir please upload more video of physics

Thanks so much for this video it was so helpful but please try to write this greek letter next to B more like that letter than like M :P My whole page was filled with Ms :P

@AKLECTURES

8 жыл бұрын

+Ola Radzio :-P

Aaaaaaaaaaaaaaaaaaaaah thank yoooooou!!!!

it's so good but we want to explain in Arabic translator 😢. youtube can translated in Arabic. but i do not know how it can dot

sory sir mujay to kuch samaj nai a raha

Hi, the same question as blue sky.

@AKLECTURES

9 жыл бұрын

Hi! Sorry if you were confused, let me try to clarify whats taking place. The proton is spinning and when we turn on the external (stationary) magnetic field, that external magnetic field tries to orient it along the direction of the magnetic field lines. Then we shoot an oscillating electromagnetic wave at the proton (on top of that stationary external magnetic field), and that is what flattens out the precession of the proton. I recommend watching my lecture on MRI (magnetic resonance imaging). Its an application of NMR and it can help you better understand that I was talking about.

You have made 2 mistakes 1. mag moment of p = 2.79 NM You have mentioned =2.79 BM which is wrong 2. Energy difference = mag moment x B after taking half spin into considered. Half + half =1, not 2 x mag monent x B.

Plz sir reply

yes but... angular momentum does what? not clear, so bad.

@AKLECTURES

7 жыл бұрын

if only you asked nicely.. have a nice day :-)

@leonardofranco7398

7 жыл бұрын

AK LECTURES sorry.. study frustration

You must spend so much time on Wikipedia.

its good but god i can hear you, stop shouting :)

@stevebee6124

7 жыл бұрын

Just a thought, but I think that turning your volume down would be easier.

@Tibazz

7 жыл бұрын

I know man :) The point was that he is quite intense, it was a bad joke. Althou there is some crackling of the sound because he is so loud, that problem is not fixed by turning down the volume.

@stevebee6124

7 жыл бұрын

haha all good, I'm a bit stressed from study and snapped a bit. All the best :)

@romanXmarin

6 жыл бұрын

it’s a teaching technique. shouting will make you concentrate more!

@asiahjalo5548

6 жыл бұрын

Agree !

Remove the Dislike button from this video.