What are FOUR VECTORS in Special Relativity? | 4-Vector Velocity, Acceleration, Momentum etc

[@FortheLoveofPhysics]

Doppler Effect using 4-vectors ► kzbin.info/www/bejne/eqrbqmx8hMSDb7M Compton Effect using 4-vectors ► kzbin.info/www/bejne/gqbQhYaml5uNaJo Particle Decay using 4-vectors ► kzbin.info/www/bejne/hmrMgal_a7Zkj8U

[@turquoisejpg5671]

Far more helpful than a semesters worth of lectures. Thankyou

[@technics6215]

This is as good as lectures at the best universities in the world. You bring the essence of knowledge to the world. Thank you.

[@rafsanbinhossain9261]

P U M P

[@thalitaborealis6931]

Que cosa tan espectacular este curso. Please sir, consider making videos on General Relativity, I've never in my life felt so motivated to learn any topic on physics. Thank you so much!

[@FrancisZerbib]

One of the best physics channel on YT. All is very well explained. Thank you and greetings from Israel 🇮🇱

[@outroutono4937]

One of the best to ever do it! Thanks a lot and greetings from Brazil

[@owen7185]

You are the best lecturer of SR ice ever seen. Well done

[@quantummathematics777]

Sir i was waiting desperately! Can't describe my happiness on seeing the notification

[@vrjordan3204]

After this STR Sir, can you please make videos on GR ???

[@laonza7036]

Great presentation. I just watched the entire thing and I'll be watching more presentations I'm sure. And BTW - great chalkboard erasing skills as well.

[@salonisoni3815]

This was such a brilliant explanation, thank you so much for putting in the effort to create this lecture series

[@mohamadrahimsadeqi7344]

Very precisely teaching the steps, the way i love to learn and teach.

[@navstar7334]

A most excellent presentation, with a perfectly paced approach and delivered with exceptional clarity. A truly outstanding teacher IMHO (and I've seen a good few lectures on this topic 😉!). Thank you sir 👍

[@dapookiez]

Sir, you are legendary. Thanks from Norway!

[@noshinyesmin918]

Very systematic and organized

[@ChandanMohanty-dx3ox]

Your explanation is awesome sir ,I think your video have sufficient concept for graduation level 🙏

[@gvacv]

thank you very much for the wonderful video! what a great teacher you are!

[@pragnya_IITkgp]

thank you so much sir for such a great pedagogy of teaching..👏👏👏👏

[@facubusano]

Excellent video. Congrats! We need GR lectures from DIBYAJYOTI 💪

[@preeti0908]

Love you sir ❤️ Ur teaching style is osm ❤❤❤❤❤

[@KATHRYNBEULAHDIETE-SPIFF]

Thank you so much! This helped a great deal

[@thankyoouua6725]

This is special relativity where it is for a moving frame at constant velocity v. Gamma depends on v/c and since v and c are constant , why do you have non zero d(Gamma)/ dt terms at 52:24 in your acceleration expressions?

[@thankyoouua6725]

I will answer my own question. The reason is the gamma t he Professor uses is not the same gamma that is in the Lorentz transformation where in the Lorentz transformation the velocity portion of it is a constant ( the constant frame velocity). The gamma used in the 4 vector velocity refers , to the velocity of the particle you are tracing, which is not necessarily a constant. Therefore, its Time derivative is not necessarily zero .

[@alijoueizadeh2896]

Thank you for your time and effort.

[@agrajyadav2951]

You are a great professor sir!

[@davidsykes5635]

Very good explanation, thank you 🏴󠁧󠁢󠁷󠁬󠁳󠁿

[@princekryadav8874]

Wow, that was worth watching and solved my all problems , thanks sir

[@goddess_ofchaos]

Sir, thank you for this clear video!

[@mdumar9399]

Dazzling sir you are explaining very good way

[@Amlan.Anupam]

Kudos to you sir🙋‍♀️🙋‍♂️

[@tharakesh.k7079]

Was eagerly waiting for your vdos sir ...love you ..hope your health is doing good 😊

[@benardaozturk]

Amazing lesson, thank you sir!

[@laureanneMD]

wow awesome lecture!! thank you so much!

[@nabinkumarpidikaka5695]

You teach really amazing sir....I really influenced by u....

[@RAMESHNEUPANE-jg2uu]

exactly what i was looking for.

[@cesarmoreno987y]

everything is explained so clearly

[@suvashshrestha1731]

Thank you sir I am crystal clear from Nepal

[@diamondsalam6894]

Before this video I was always confuse with this tensor expression now I feel very confident I think I can do it all now

[@rikthecuber]

I am currently self-studying STR through your playlist and it is amazing. I am midway through this playlist and willreturn to this video in a day or two after the other videos are done. One thing that I wanted to know, what else is there in STR that you still have not covered yet? Also what can be a good book for it?

[@FortheLoveofPhysics]

I have tried to cover most of the topics from an undergraduate student's perspective - lorentz transformations, spacetime geometry and four-vectors

[@physicistpower8894]

David j grifith introduction to electrodynamics

[@pankajbansal654]

Like always you were amazingly great and accurate. Knowing what doubts people have, it would have been nice if you could spend some time on certain things: (1) What actually is 4 velocity if it is constant? (2) Essentially, it relates to scale factor chosen for time axis..and also it will address issue why it is chosen as C as speed of light..So I leave a question on the table...nothing can travel faster than light..is it a postulate or is there a proof available?

[@jacobvandijk6525]

I'd say, this is very usefull for students. Well done ... again.

[@cesarmoreno987y]

what an amazing video thank you so much

[@JyotiDeka1989]

You can also give a lecture about tensors - contravariant and covariant tensors. And link it with Special Theory of Relativity.

[@FortheLoveofPhysics]

Will add to the list :)

[@Muhammadusman52281]

Always like before listening complete lecture

[@Losser96]

Thank you sir for this lecture

[@physics110]

great stuff. please make a playlist for general relativity

[@brbrbrbrbrbr9338]

Video bom demais...entendi tudo. Obrigado

[@doutormanhattan5680]

Finalmente um comentário BR.

[@victoriarisko]

The best❤❤❤

[@CrisJahnke]

Excellent!!!

[@vanshtibrewal4791]

This was the best lecture ever which I have seen. Sir the way you explained this complicated concept in very easy words it's just unbelievable i am a class 9 student and still I'm able to grab this concept just because of you. You are the best sir❤️❤️

[@motivationav8584]

Sir please make a video on tensors

[@ratandixit6646]

Please upload videos of Modern physics

[@jellyfrancis]

I have a doubt....how to apply curl and how to take cross product to 4d vector ? 🤔

[@shubhmittal77]

Why there is negative sign before temporal component?

[@technics6215]

Why in Lorenz transformation we have y_ = y and z_=z? That makes whole 4 vectors actually projected to "two dimensional surface". So what is the point messing around 4 vectors with Lorenz transformation if it works only if you actually have 2 vectors?

[@ravindrasuthar]

Thank u sirr ❤️✨

[@PKENTERTAINMENT888]

Very good👍

[@paulhefner2813]

can delta x divided by delta tau be greater than the speed of light?

[@tenzinchoejor3477]

what are the trosomation rule

[@pepo2.034]

Hi I was studying special theory of relativity by Robert resnick and a bit is only given about in the book.So it's Means that including 3 direction + time = 4 dimension but if there are 4 direction then what will we call it?

[@ashishbhargavkalita2013]

can you please provide videos on tensors

[@cesarmoreno987y]

you are the best

[@watermelonsugahiiiiiiiiiii3051]

Thankkksss sooo muchhh

[@mikalghorbani7642]

Fantastic

[@زينالعابدينماجد-د2ب]

THANK YOU so much

[@paulhefner2813]

thank you. You use relativistic mass. Einstein seemed unsure of this concept. Why are you confident of this concept?

[@MVm9761]

Sir, what is the magnitude of four acceleration

[@doutormanhattan5680]

You should mention that the gama that appears in the definition of 4-velocity is not the same as the gama that appears in Lorentz Transformation. I would avoid so much confusion.

[@msc-eg3rn]

Why there is "i" in ict?

[@chai1241]

You are amazing

[@rohitdhawa1195]

Sir please make videos on tensor calculus

[@Satabdikakati]

Thank you sir

[@deepakdas564]

Sir make vedio about astrophysics

[@An_art_appreciator]

It’s video not vedio

[@ahsanrazaq157]

can u elaborate more about the negative sign in the inner prodect

[@FortheLoveofPhysics]

When we find length/magnitude of a physical quantity, (which is essentially inner product of the quantity with itself) in 4D spacetime, we follow a (- + + + ) convention (ie. - sign before temporal, and + sign before spatial components, which i have chosen in the video) or ( + - - - ) convention. This is the result of the geometric properties of spacetime. Choosing such a convention effectively makes the magnitude of a physical quantity Invariant under a Lorentz transformation (which you can think of as preserving the length of a vector under coordinate transformation). This is a unique difference between flat euclidian space and minkowski spacetime

[@ahsanrazaq157]

@@FortheLoveofPhysics Thanks sir for ur reply

[@ChandanMohanty-dx3ox]

Excuse me sir can you please make videos on Nano technology and application 🙏

[@doutormanhattan5680]

Suas explicações são muito esclarecedoras. Obrigado.

[@thorntontarr2894]

The approach you use of defining the four velocity of a particle wrt an observer seems arbitrary even if it is the convention. Yes, you do further state that if this is to be a four vector of velocity, it must be invariant under a Lorentz Transformation in Special Relativity. This I understand. Should one not be able to define the four velocity of a particle in its rest frame? For example, let's take a photon and define its four velocity in its rest frame or proper frame. This inner product must also be c^2. YES/NO?

[@mdabulkalammollah687]

Book reference?

[@aupadhyay]

What a coincidence... I was searching for this topic

[@electron2229]

Sir, I am from Bangladesh. I didn't understand this topic. What should I do?

[@An_art_appreciator]

Cry

[@rafsanbinhossain9261]

is nothing but whar?

[@Addictmore__]

Can we use iota

[@Dismythed]

It turns out that time is not the fourth dimension. Time, like space, is a superdimension-not itself a dimension, but a collection of dimensions. For each spatial dimension, there is a perpendicular time dimension. The 4-vector is represented as 3 spatial dimensions added together and 1 time dimension subtracted. But this is not what is real. That single time "dimension" is actually the sum of three time vectors at a right angle to the three spatial vectors. So to correctly express this, you must divide the time vector in half to get its z component and divided it again to get its x and y components or else represent the y and z components in a Minkowski matrix by 1 and -1. This, if done to represent the truth, should be 6-vector, not 4-vector.

[@siddharthraj2688]

Sir please solve the hw once in all your previous videos too you have given the same hw to calc norm of 4 acc vector and find its LT Matrix solve it once if possible can’t get the solutions on internet

[@waleedahmed1809]

Next video kb bnao gy sir

[@skphysics8269]

Sir can you start video for csir net exam

[@theofficialfbiguy]

thought this was a gun class 💀

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Hansraj college is having best faulty 🙂🙂

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👏👏👏👏👏

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Wow

[@Imagino13]

❤

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First view

[@Amlan.Anupam]

Mera

[@_tasneem7378]

are you real!!!!!!!!!!? wooooooooooooow thaaaaaaaaanks