This is AN AMAZING course. I´ve never met before such clear but deep ideas on teaching about SR..... The only improvement I can think of would be a similar course in General Relativity: Such course would be AWSOME if taught by this incredible teacher. Thanks for this course from Spain.
The more he explains, the more questions I have. Strange as it may seem, this means that I understand what he's saying. Thank you for the amazing lecture series! Greetings from Michigan :)
My professor could not develop the interest that I have developed after hearing to your lecture sir, thank you so much, I finally understood the problem with classical mechanics😊🙏👍
hai sir will you please explain me once that the point you have said at 28:20 in the above lecture that you had said the both frames s ans s' are intertial frames of references but the relative velocity between the both frames of references does not depend on time . My dought is why it doesnt depend on time.
It has been explained at 21:00. Observers in two inertial frames find an isolated object to move with a velocity which does not depend on time. It means that the relative velocity between the frames is also time independent. Hence an inertial frame can not accelerate in the frame of any other inertial frame.
These professors should mention the names of book at the start for self reading snd their lectures should be available in text form on internet. Request to nptel
Your question is not clear. We can always compare speeds observed from two different frames. Only thing they would be different in different frames. The velocities in two different frames would follow standard relative velocity formula. If the speeds are high and are close to speed of light, you must use relativistic formula.
An inertial frame can not accelerate relative to another inertial frame. Of course, in case a real force is applied to a particle, that particle would be found to be accelerating in an inertial frame. In the same fashion, if there is no real force on it, the particle would appear to move with a constant velocity in an inertial frame.
At 20:15, the object was assumed to be an isolated one implying that there is no real force on it. Hence in an inertial frame its velocity would be constant. At 24:24, the object being observed need not be isolated, hence there could be a real force acting on it, causing it to accelerate even in an inertial frame.
At 20:15 he is saying that acceleration is not dependent on frame of refference (means when we change frame of reference the acceleration will not change). At 24:24 he is saying let the object be accelerating and the if we switch the frame of refference from non inirtial to an inertial frame or switch from inertial to inertial frame the accleration would be same in all frame of refferences . Which he has proved in last of that topic . Hope this would help you 🙂
Thanks for reply..sir..listen once more...We can just take a reference frame outside the earth (in space) to get the absolute rest condition ...but why we needed to consider a medium such as ether to overcome the problem??Yes,I understand this theory can explain other demand such as propagation of light,let just forget about that .... general theory of relativity sustains as long as we hold the existence of ether medium....but why go to the idea of ether in the first place where we can just claim space as as a reference frame as absolute rest???
Sir ...can you explain again why we came the idea of ether to eliminate the the difficulties of the different speed of light for different reference frame??I don't understand that part..
The basic issue is that according to electromagnetic theory speed of light is related to fundamental constants. Also according to classical relative velocity formula, the velocity is a frame dependent quantity. Hence if the fundamental constants are not frame dependent, how can speed of light be frame dependent? By introducing the concept of Ether, one could say that it is only if speed of light is measured in Ether frame, will that be related to fundamental constants. Speed of light in any other frame will not bear the relationship with fundamental constants as was derived from electromagnetic theory. Further the concept of ether also helped the scientists of that era in visualizing light as a wave which requires a medium to travel. Because presence of a medium was considered essential for waves to propagate.
11:38 sir ,if according to Newton's first law he emphasized constant velocity as natural state of motion ,but we know according Newton first law too that if an object at rest will remain at rst until it is acted by some external forces, it is mentioned too in Newton's first law .so sir how can we say according to newton constant velocity is natural state of motion ñ
It's strange..but..as the lecture ends.. I'm smiling with curiosity and wonder.. It's just the word 'waaoo', I'm spelling again and again. My professor made this a dumb boring thing..but you just preserved the curiosity :) Thankyou sir !
If velocity is constant with time for isolated object in inertial frames how are we finding acceleration of two isolated objects in inertial frames can't understand 😶
The idea is that on isolated objects there can not be a real force. Hence as per Newton’s law, the acceleration of the isolated object is zero. A frame in which one really notices zero acceleration for an isolated object is an inertial frame.
The bodies can accelerate in an inertial frame only when there is a real force on them. And this force can arise only as a result of interaction with some other body. The idea of having an isolated body (particle) is that there can not be a real force on that, which ensures that the body is not accelerated. .I hope I have answered your question.
Great lecture. The best I have found so far about inertial vs non-inertial frame of reference. However, the way he pronounce some words is very annoying. For example azume for assume, meazure for measure, meazurement for measurement and so on. I thought Indians are fluent in English!
Mamdough I do you judge the knowledge of a person by his pronounciation?Come to India and learn any one of India language. Do you judge the fluency of Indians by the accent of one person?
Sorry sir I'm asking out of video but i think you only answer who i know.....the ques is....every galaxy have its blackhole at its centre the universe start from big bang like nuclear bomb and it expand and expand but there is a time when it stop to expand and start to shrink and.....is all the matter again goes to none or shrink to a single point.....sir i hope u will answer soon
There is one problem when he talks about measuring speed of light in different reference frames. His conclusion is right while i doubt his argument. He argues that different observers in different frames measures speed of light differently because frame is moving too, CORRECT! but then he argues that are the values of permeability and permitivity different in different frames? I find this wrong argument as the observer is NOT measuring the ABSOLUTE speed of light, all he is doing is measuring RELATIVE speed of light from his reference. When he will measure the speed of light (absolute) from a light source in his reference system then he will be actually in a position to compare observed speed of light with maxwell's formulae
This is AN AMAZING course. I´ve never met before such clear but deep ideas on teaching about SR.....
The only improvement I can think of would be a similar course in General Relativity: Such course would be AWSOME if taught by this incredible teacher. Thanks for this course from Spain.
If you watch the whole video series........your concepts will be as strong as Ambuja cement👍
I have weird doubts after watching first lecture should I continue😶
@@luciferzen8236ya
This guy is a really good teacher. I'm looking forward to the next lesson. Thanks for the upload!
Best lecture about the topic i have found so far. Thank you very much.
The more he explains, the more questions I have. Strange as it may seem, this means that I understand what he's saying. Thank you for the amazing lecture series! Greetings from Michigan :)
Thanks, I was thinking will it be good or not to watch this series of lectures, I will give a try for sure.
My professor could not develop the interest that I have developed after hearing to your lecture sir, thank you so much, I finally understood the problem with classical mechanics😊🙏👍
Such a down to earth explanation. I've found it really helpful! I would finish watching the rest of the videos within the lockdown days😊
thank you soo much ..your are the teacher who knew what he is teaching.
really this lecture is much helpful for me.i have increased my knowledge level in this topic.
thanks to nptel and Prof. Shiva Prasad Sir for this great lecture series.
Great explanations..... I'm thankful to you provide such typical type of course so easy manners ....Thanks nptel.
great lecture.finally i got a palce to study STOR. thanks NPTEL
The most clear explanation for reference frames and real forces , thank you sir.
Very nice sir .I have never seen as logical explanation of relativity theory as you gave
Nice sir maja aa gya abhi tak esa lecture ni mila 4 saal purana hai par abhi bhi iske comparison ka koi nahi hai is platform par
extremely great lectures.Finally developing an interest in stor
This is the best introduction to special theory of relativity
What an awesome lecture never got such gr8 information on SR
Thumbs up for the awesome music in the beginning !
what is the name of that music..? can u name it i wnat to search for it!
Excellent lecture by a super excellent professor!
This was very Helpful for beginning Special theory of relativity
Thank you for Making Concepts clear
i cant tell you what i got ..... what a beautiful explanation 🤗🤗🤗🤗🤗🤗🤗🤗🤗
Thank you Thank you Thank you for having good audio quality
1st comment of my life on CZcams and it's AWESOME
Lol 🤣
Wow,......great explanation sir
Excellent explanation
Thank you very much sir...
What a prof. Hats off
What an excellent lecture sir
Sir, you are the best:)
Sir, from which book you prepare these lectures.or give me recommended book name of STR plz sir
Thanks🌹🙏
Great lecture sir..!
Amazing lecture
hai sir
will you please explain me once that the point you have said at 28:20 in the above lecture that you had said the both frames s ans s' are intertial frames of references but the relative velocity between the both frames of references does not depend on time . My dought is why it doesnt depend on time.
It has been explained at 21:00. Observers in two inertial frames find an isolated object to move with a velocity which does not depend on time. It means that the relative velocity between the frames is also time independent. Hence an inertial frame can not accelerate in the frame of any other inertial frame.
Fabulous amazing
Now I understand why iit is different from others 🇮🇳🇮🇳, no wonder why iitans are successful.
You are best sir
Thank you
Beautiful ...
Thank you so much sir 🙂🙂🙂🙂
thanks sir
Thx sir....
Great sir please put all lacture of bsc first year
These professors should mention the names of book at the start for self reading snd their lectures should be available in text form on internet. Request to nptel
sir, can you please name some good books to read on the topic special theory of relativity
Send him email
If have book names plz share me
Is these video series eniugh for csir or but time taking
Sir can you tell me book name which you have followed
Sir i have a question. Why we can't compare the speeds observed from two diffrent frame of refrences?
Your question is not clear. We can always compare speeds observed from two different frames. Only thing they would be different in different frames. The velocities in two different frames would follow standard relative velocity formula. If the speeds are high and are close to speed of light, you must use relativistic formula.
Thankyou sir.
Sir for an inertial frame of reference accn can be experienced ..but only if external force is applied.
M i right
An inertial frame can not accelerate relative to another inertial frame. Of course, in case a real force is applied to a particle, that particle would be found to be accelerating in an inertial frame. In the same fashion, if there is no real force on it, the particle would appear to move with a constant velocity in an inertial frame.
can any one explain at 20.15 he said velocity of object should be constant and at 24:24 he said object may have acceleration???
At 20:15, the object was assumed to be an isolated one implying that there is no real force on it. Hence in an inertial frame its velocity would be constant. At 24:24, the object being observed need not be isolated, hence there could be a real force acting on it, causing it to accelerate even in an inertial frame.
At 20:15 he is saying that acceleration is not dependent on frame of refference (means when we change frame of reference the acceleration will not change). At 24:24 he is saying let the object be accelerating and the if we switch the frame of refference from non inirtial to an inertial frame or switch from inertial to inertial frame the accleration would be same in all frame of refferences . Which he has proved in last of that topic . Hope this would help you 🙂
Very deep
Is this profitable for semester exam
Thanks for reply..sir..listen once more...We can just take a reference frame outside the earth (in space) to get the absolute rest condition ...but why we needed to consider a medium such as ether to overcome the problem??Yes,I understand this theory can explain other demand such as propagation of light,let just forget about that .... general theory of relativity sustains as long as we hold the existence of ether medium....but why go to the idea of ether in the first place where we can just claim space as as a reference frame as absolute rest???
Is space is at absolute rest?
Is space a 'thing', where you can erect your axes and put your observer?
Sir ...can you explain again why we came the idea of ether to eliminate the the difficulties of the different speed of light for different reference frame??I don't understand that part..
The basic issue is that according to electromagnetic theory speed of light is related to fundamental constants. Also according to classical relative velocity formula, the velocity is a frame dependent quantity. Hence if the fundamental constants are not frame dependent, how can speed of light be frame dependent? By introducing the concept of Ether, one could say that it is only if speed of light is measured in Ether frame, will that be related to fundamental constants. Speed of light in any other frame will not bear the relationship with fundamental constants as was derived from electromagnetic theory. Further the concept of ether also helped the scientists of that era in visualizing light as a wave which requires a medium to travel. Because presence of a medium was considered essential for waves to propagate.
@@shiva1052 I think that how speed of light could be a fundamental constant.
It always makes me in difficulty
@@kumar-qb2pe Because it can be expressed in terms of fundamental constants. This expression was derived using electromagnetic theory.
11:38 sir ,if according to Newton's first law he emphasized constant velocity as natural state of motion ,but we know according Newton first law too that if an object at rest will remain at rst until it is acted by some external forces, it is mentioned too in Newton's first law .so sir how can we say according to newton constant velocity is natural state of motion ñ
Zero velocity is also a constant velocity. In any case the velocity is a frame dependent quantity
It's strange..but..as the lecture ends.. I'm smiling with curiosity and wonder..
It's just the word 'waaoo', I'm spelling again and again.
My professor made this a dumb boring thing..but you just preserved the curiosity :)
Thankyou sir !
If velocity is constant with time for isolated object in inertial frames how are we finding acceleration of two isolated objects in inertial frames can't understand 😶
The idea is that on isolated objects there can not be a real force. Hence as per Newton’s law, the acceleration of the isolated object is zero. A frame in which one really notices zero acceleration for an isolated object is an inertial frame.
Sir what if two bodies are accelerating in deep space so how to know the actual acceleration of the body.....
The bodies can accelerate in an inertial frame only when there is a real force on them. And this force can arise only as a result of interaction with some other body. The idea of having an isolated body (particle) is that there can not be a real force on that, which ensures that the body is not accelerated. .I hope I have answered your question.
@@shiva1052 thankyou sir
Mod prasad special Relativity
Great lecture. The best I have found so far about inertial vs non-inertial frame of reference.
However, the way he pronounce some words is very annoying. For example azume for assume, meazure for measure, meazurement for measurement and so on. I thought Indians are fluent in English!
The way people misuse words is very annoying. I thought fluency in English has nothing to do with an accent.
Mamdough I do you judge the knowledge of a person by his pronounciation?Come to India and learn any one of India language.
Do you judge the fluency of Indians by the accent of one person?
You dont deserve this lecture.
Sorry sir I'm asking out of video but i think you only answer who i know.....the ques is....every galaxy have its blackhole at its centre the universe start from big bang like nuclear bomb and it expand and expand but there is a time when it stop to expand and start to shrink and.....is all the matter again goes to none or shrink to a single point.....sir i hope u will answer soon
19:20-20:00
There is one problem when he talks about measuring speed of light in different reference frames. His conclusion is right while i doubt his argument. He argues that different observers in different frames measures speed of light differently because frame is moving too, CORRECT! but then he argues that are the values of permeability and permitivity different in different frames? I find this wrong argument as the observer is NOT measuring the ABSOLUTE speed of light, all he is doing is measuring RELATIVE speed of light from his reference. When he will measure the speed of light (absolute) from a light source in his reference system then he will be actually in a position to compare observed speed of light with maxwell's formulae
el baile de los que sobran suena al principio csm xd
in subtitles lawrence force is written which is lorentz force ..... i think
theory of relativity has nothing to do with e=mc^2 it is energy mass equivalence.
the equation is derived from the basic principles and postulates of relativity
..