A little bit late to this video, but I want to say a huge thank you. Very well explained compared to my copy of Kittel and definitely helpful for my current research which has a bit of a learning curve for an undergrad like me. Thank you again!
the basis vectors a's and b's taken by Prof. to define any random vector in the real and reciprocal space systems are unit vectors or should be primitive vectors.
Does this mean that if you were sampling a cubic structure with x-rays and you had a 2D film, the 'points of light' on the film would be arranged in a cubic form?
The reciprocal lattice of a simple cubic system is simple cubic but the diffracted beam pattern as revealed in the film is in real space...so in that sense the reciprocal lattice for a real space form is irrelevant?
I am a little unsure about the reciprocal lattice vectors. If we say they have units of L^-1 then how can they be regarded as a vector? I see their direction but the magnitude is not directly comparable to a real space vector. Can we just say that the magnitude unit does not matter (L^-1is just another scalar quantity)? Force vectors have direction, and units of Newtons. So is this analagous? The Reciprocal Lattice vector does not have a magnitude of length but of length to the -1?
Students should learn first Mathematical physics lectures by samudra Roy then learn Nuclear physics lectures and other topics lectures by prof .H.C Verma then refer to IIT M lectures then you will understand.Exception prof .S.Srinivasan s lectures on Electronics who is the only best .professor in IITM.
Hi, nice lectures. I got a question, first you obtain the Cn coefficients of the Fourier series then use it as a Schwartz function to get the Poisson summation formula to finally obtain the reciprocal lattice function. Why don't just get the Cn coefficients and then simply get the Fourier transform?. Correct me if I'm wrong but at the end of the day it is the same result. Is there an advance using the Schwartz-Poisson method over FT?
Why does he write on the blackboard? To teach them writing? Horrible accent, slang like " you know", " OK" is NOT Ok. Poor lecturer who gets his money and lives happily ever after, ok? Haha, pretends that he works by writing instead of using PPT presentation, simply uses the time for English writing.
Also as a native english speaker, what are you talking about "you know" and "ok" as slang?? These are both used in professional settings and are not in any way shape or form unprofessional. And his accent is not difficult to understand in the slightest. What is wrong with you?
@46:30 Although the relationships are right, your explanation of the concept suddenly runs into memorial writing of relationships rather than the usual elaboration logic you implement in your lectures, hence it difficult to understand this bit
He is saying regardless the integers values of p,q and r , so to guarantee all the cases we must take the more severe condition so taking h,k and l to be only integers
His own book - 'Physics of Materials: Essential Concepts of Solid-State Physics' by Prathap Haridoss. www.amazon.com/Physics-Materials-Essential-Concepts-Solid-State-dp-8126557877/dp/8126557877/
